G2 SEC examination answers are complete only when every required function in the question can be traced to something visible in the response. Correct knowledge is necessary, but the paper also asks for source, scope, count, unit, format, evidence, comparison, explanation and other specific obligations.
This one-hundred-and-sixty-eighth Learner’s Guide develops requirement traceability across K200 English, K210 Mathematics and K223–K225 Science. The goal is to make answer completeness auditable: every live requirement should map to an explicit sentence, calculation, evidence point, label or final-form choice.
Mechanism: tasks create obligations
A question can be treated as a small specification. Each instruction creates an obligation, and the response contains fulfilment evidence. Traceability links obligation → answer element → verification. Missing links reveal incomplete answers even when the subject knowledge is correct.
Diagnosis
Before adding more content, list the active requirements: command, count, source, scope, format, unit, domain and evidence. Then point to the exact location in the answer that fulfils each one. Any requirement without a visible fulfilment point becomes the next repair target.
Smallest repair
Repair the missing trace only. If the answer lacks a unit, add the unit. If it lacks the second reason, add one distinct reason. If it uses the wrong source, replace only the unsupported evidence chain. Do not rewrite fulfilled sections merely because one obligation is missing.
1. Command word
Requirement: Map each answer section to what the verb requires: identify, explain, compare, evaluate or calculate.
Trace check: An answer can contain correct facts and still fail if no sentence performs the requested function.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
2. Requested count
Requirement: Trace each requested point to a distinct answer unit.
Trace check: Two examples of the same reason do not satisfy ‘two reasons’.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
3. Source restriction
Requirement: Mark which sentence is supported by which text, speaker, graph or table.
Trace check: Relevant evidence from the wrong source does not fulfil the requirement.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
4. Own-words requirement
Requirement: Trace paraphrased wording back to source meaning without copying distinctive phrasing.
Trace check: Meaning must remain faithful while wording changes.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
5. Quotation requirement
Requirement: Make sure the quoted words actually support the interpretation attached to them.
Trace check: Quotation without explanation can leave the proof obligation unpaid.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
6. Word limit
Requirement: Allocate only requirement-bearing information.
Trace check: Extra material can crowd out required points.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
7. Audience
Requirement: Trace tone, detail and examples to the intended reader.
Trace check: A technically correct response can still miss the communication task.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
8. Purpose
Requirement: Mark which sentences inform, persuade, recommend, explain or narrate.
Trace check: Purpose should shape structure, not just final sentence.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
9. Format
Requirement: Check whether the response uses the required text type or answer form.
Trace check: A strong paragraph in the wrong format can still lose marks.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
10. Time period
Requirement: Trace every claim to the requested time window.
Trace check: Historical or future evidence may be irrelevant to a current-period question.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
11. Population
Requirement: Trace generalisations to the group actually named.
Trace check: Do not widen one subgroup into everyone.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
12. Location
Requirement: Trace spatial claims to the specified site, region, compartment or graph section.
Trace check: A local answer is not automatically system-wide.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
13. Unit
Requirement: Attach the requested unit to the final numeric claim.
Trace check: A correct value without its unit can leave the interface incomplete.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
14. Accuracy
Requirement: Trace rounding or significant-figure choice to the instruction.
Trace check: Do not invent precision the task did not request.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
15. Exact form
Requirement: Keep surds, fractions or symbolic forms when required.
Trace check: A decimal can fail a representation requirement even if numerically close.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
16. Minimum/maximum
Requirement: Trace the final integer choice to the feasibility wording.
Trace check: Nearest integer is not always the required operation.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
17. Positive/whole-number domain
Requirement: Check every candidate against the live domain.
Trace check: Algebraic solutions outside the domain do not satisfy the task.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
18. Graph-use requirement
Requirement: Ensure at least one reasoning step genuinely uses graph evidence.
Trace check: Do not answer from memorised theory when the question tests reading.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
19. Table-use requirement
Requirement: Trace numbers to correct rows/columns and headings.
Trace check: Data ownership is part of requirement fulfilment.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
20. Two-source synthesis
Requirement: Ensure both sources contribute distinct information.
Trace check: One source repeated twice does not satisfy synthesis.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
21. Comparison
Requirement: Trace answer structure to a common criterion for both sides.
Trace check: Two separate descriptions are not yet a comparison.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
22. Contrast
Requirement: Make the difference explicit and criterion-matched.
Trace check: Opposite facts without relation can remain disconnected.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
23. Cause
Requirement: Trace the claimed cause through a mechanism or valid design.
Trace check: Sequence alone does not satisfy causal explanation.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
24. Effect
Requirement: State the outcome produced or associated with the named factor.
Trace check: Do not substitute background detail for the requested consequence.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
25. Mechanism
Requirement: Map cause → intermediate process → outcome.
Trace check: A missing bridge leaves the explanation incomplete.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
26. Evidence
Requirement: Attach each conclusion to observable text, data or design evidence.
Trace check: A plausible answer is not enough.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
27. Inference
Requirement: Separate what is observed from what is concluded.
Trace check: Trace the inference to the evidence window that licenses it.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
28. Writer attitude
Requirement: Use language evidence plus whole-text consistency.
Trace check: One isolated adjective rarely fulfils the requirement alone.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
29. Writer purpose
Requirement: Trace purpose to repeated choices, structure and audience effect.
Trace check: Do not confuse topic with purpose.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
30. Language effect
Requirement: Name what the wording makes the reader notice, feel or infer locally.
Trace check: Technique labels alone do not fulfil the task.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
31. Summary relevance
Requirement: Trace every selected point to the summary focus.
Trace check: Interesting but irrelevant detail should be removed.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
32. Summary uniqueness
Requirement: Ensure each point contributes new information.
Trace check: Duplicated points waste the limited requirement budget.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
33. Situational content point
Requirement: Tick each prompt bullet when it is fulfilled.
Trace check: No bullet should rely on implied coverage only.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
34. Situational tone
Requirement: Trace greeting, register and requests to relationship/purpose.
Trace check: Tone is a requirement, not decoration.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
35. Oral viewpoint
Requirement: Ensure examples support the stated position.
Trace check: A vivid story that weakens the position fails traceability.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
36. Listening answer
Requirement: Trace the response to what was actually heard rather than reconstructed.
Trace check: Uncertain notes should stay marked until confirmed.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
37. Mathematics target
Requirement: Write the requested quantity above the working.
Trace check: Intermediate values should trace forward to that target.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
38. Knowns
Requirement: Trace every equation term to a given or derived quantity.
Trace check: Unowned numbers are warning signs.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
39. Unknowns
Requirement: Define symbols before using them.
Trace check: A symbol without ownership breaks the trace chain.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
40. Formula condition
Requirement: Trace formula choice to conditions in the question.
Trace check: Familiarity does not satisfy applicability.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
41. Case condition
Requirement: Attach every branch to the condition that activates it.
Trace check: Case work without labels can be impossible to audit.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
42. Probability universe
Requirement: Trace numerator and denominator to the same sample space.
Trace check: Favourable events and total outcomes must belong together.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
43. Percentage base
Requirement: Write ‘percentage of what?’ beside the calculation.
Trace check: The denominator is part of the requirement.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
44. Rate base
Requirement: Write units per denominator explicitly.
Trace check: Direction errors become visible when the base is named.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
45. Science independent variable
Requirement: Trace it to the factor deliberately changed.
Trace check: Do not infer role from position in a table only.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
46. Science dependent variable
Requirement: Trace it to the measured response.
Trace check: Measured does not automatically mean caused.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
47. Science control variable
Requirement: Trace it to an alternative explanation being constrained.
Trace check: A list of controls without function is weak.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
48. Science control condition
Requirement: State what the control lets you compare.
Trace check: ‘Fair test’ is too vague.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
49. Science conclusion
Requirement: Trace scope to sample, range and design.
Trace check: Do not generalise beyond what was tested.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
50. Science improvement
Requirement: Trace proposed change to a named weakness.
Trace check: Generic ‘repeat more’ can miss the actual problem.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
51. Science limitation
Requirement: State what remains unresolved and how it affects the conclusion.
Trace check: A limitation should change confidence or scope.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
52. Science model
Requirement: Trace each prediction to a stated assumption.
Trace check: If the assumption fails, the prediction may not count.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
53. Science anomaly
Requirement: Keep the anomalous point visible and trace the diagnostic response to it.
Trace check: Do not erase data to make the model cleaner.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
54. Final answer box
Requirement: Ensure the verified result actually reaches the final response surface.
Trace check: Correct scratch work cannot earn credit if not transferred.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
55. Question number
Requirement: Trace each final answer to the correct item.
Trace check: Interface mistakes can detach correct work from its requirement.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
56. Revision trace
Requirement: When editing, ensure required points are not accidentally removed.
Trace check: Polish can destroy fulfilment if traceability is not checked.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
57. Repair trace
Requirement: After correcting one upstream step, identify which answer parts inherit the correction.
Trace check: Do not change independent fulfilment unnecessarily.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
58. Closure trace
Requirement: Before moving on, confirm every live hard requirement has at least one visible fulfilment point.
Trace check: If a requirement has no trace, the answer is not complete.
For practice, mark the requirement in the question and draw a line to the exact response element that fulfils it. If no line can be drawn, the answer has a completeness gap. If several lines lead to the same weak sentence, check whether the obligations are genuinely distinct.
For transfer, change the subject surface while preserving the requirement type. The learner should rebuild the trace from the live task rather than reuse the old answer shape automatically.
Competing explanations
A missing mark can come from weak knowledge or from failed requirement fulfilment. Distinguish them by asking whether the learner knew the relevant fact but never connected it to the requested function. This prevents unnecessary reteaching when the real problem is interface or task parsing.
Observation versus inference
The visible answer element is observable. The judgement that it fulfils a requirement is an inference based on the command and marking function. Keep that mapping explicit enough that another reader could audit it.
Support versus proof
One answer sentence can support several obligations, but do not assume it proves all of them. A sentence may compare and explain, or identify and justify, but each function should still be visible in the wording.
Model limits
Traceability is not a call for mechanical templates. Some high-quality responses fulfil several requirements fluidly in one sentence or paragraph. The framework is a diagnostic tool: it checks whether the obligations are present without forcing one rigid style.
Delayed transfer
Return later with unfamiliar question forms. Ask the learner to extract the requirement set, write the answer, trace each obligation to the response and diagnose one missing link. Success means the learner can do this without a pre-made checklist tailored to the exact question.
Internal learning links
Use the Examination Craft hub, Vol 0140 Proof Obligations, Vol 0124 Constraint Stack, the relevant English, Mathematics and Science hubs, and the PSLE Learner’s Guide.
MOE and SEAB current framework
MOE states that Full Subject-Based Banding is fully implemented and that, from 2027, the Singapore-Cambridge Secondary Education Certificate (SEC) replaces the former N- and O-Level examinations, with graduating students sitting subjects at their respective G1, G2 or G3 levels. See the official MOE Full SBB / SEC announcement. For current 2027 G2 school-candidate subject codes and syllabuses, use the official SEAB G2 syllabus directory, which lists K200 English Language, K210 Mathematics and K223–K225 Science combinations.
Final rule
Every live requirement should have a visible fulfilment point in the response. If you cannot trace the instruction to the answer, the task is not yet complete—even if every sentence you wrote is individually correct.
G2 SEC Learner’s Guide: Open the Vol 0132–0175 hub and subject index.
