G2 SEC examination reasoning becomes safer when learners separate what is given, what is derived, and what is merely assumed. Hidden assumptions are dangerous because later English inferences, Mathematics calculations and Science explanations can look correct while resting on a condition the question never granted.
This one-hundred-and-sixty-fourth Learner’s Guide develops an assumption ledger across K200 English, K210 Mathematics and K223–K225 Science. The aim is not to write extra notes for their own sake. The aim is to make every load-bearing statement auditable before later work depends on it.
Mechanism: reasoning carries state forward
Every answer uses a working state. Some parts of that state come directly from the task, some are derived from valid operations, and some are introduced by the learner. If an introduced assumption is false, every descendant can inherit the error. The ledger prevents silent state changes.
Diagnosis
When an answer feels uncertain, classify its key premises: G for given, D for derived, C for convention/definition, A for assumption. If a crucial premise cannot be classified without guessing, that is the first diagnostic target.
Smallest repair
Either justify the assumption from evidence, replace it with a weaker statement, carry multiple cases, or remove it entirely. Do not rewrite correct downstream work unless the assumption actually changes it.
1. Explicitly given
Risk: The information appears directly in the stem, passage, table, graph or diagram.
Ledger move: Mark it G and preserve its wording, unit, source and scope.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
2. Derived fact
Risk: The information follows from a valid calculation, inference or relation.
Ledger move: Mark it D and keep the derivation available because later work depends on it.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
3. Working assumption
Risk: The information is not stated but is temporarily adopted to proceed.
Ledger move: Mark it A and test whether the problem actually permits it.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
4. Convention
Risk: A standard rule such as angle sum or unit conversion is used.
Ledger move: Name the rule rather than hiding it as an assumption.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
5. Definition
Risk: A term is used by definition, not guessed.
Ledger move: Separate definitions from empirical claims.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
6. Diagram appearance
Risk: A line looks parallel or an angle looks equal.
Ledger move: Do not upgrade appearance to given unless marked or stated.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
7. Graph straightness
Risk: Points look roughly linear.
Ledger move: Treat linearity as a model hypothesis unless the question states it.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
8. Constant rate
Risk: A story mentions movement but not constant speed.
Ledger move: Do not assume constancy unless supported.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
9. Equal likelihood
Risk: Outcomes are counted as if equally likely.
Ledger move: Check whether the sample space or context justifies this.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
10. Representative sample
Risk: A sample is treated as if it represents a population.
Ledger move: Check selection, location, time and subgroup coverage.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
11. Stable baseline
Risk: The first reading is treated as fixed reference.
Ledger move: Check for drift or concurrent control.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
12. No friction
Risk: A mechanics-style context is simplified silently.
Ledger move: Use only if the model or question permits.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
13. Negligible loss
Risk: Energy, material or time loss is ignored.
Ledger move: State this if the conclusion depends on it.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
14. Well-mixed compartment
Risk: One sample is treated as representing the whole mixture.
Ledger move: Check whether spatial gradients are negligible.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
15. Instantaneous response
Risk: Cause and effect are treated as simultaneous.
Ledger move: Check lag and process timescale.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
16. No interaction
Risk: Effect of A is assumed independent of B.
Ledger move: Check whether multi-factor data support this.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
17. No path dependence
Risk: Current input is assumed sufficient to determine response.
Ledger move: Check starting state and history.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
18. No threshold
Risk: A smooth response is assumed across all values.
Ledger move: Check breakpoints and minimum conditions.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
19. No saturation
Risk: More input is assumed to keep increasing output.
Ledger move: Check for plateaus or limiting factors.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
20. English speaker identity
Risk: A pronoun or possessive is interpreted from the wrong speaker.
Ledger move: Make source perspective explicit.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
21. English narrator reliability
Risk: Narrator statements are treated as objective truth.
Ledger move: Use text signals before assuming reliability.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
22. English motive
Risk: A character action is assigned a reason not stated.
Ledger move: Mark motive as inferred and attach evidence.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
23. English attitude
Risk: One word is treated as whole-text stance.
Ledger move: Mark global attitude as derived, not given.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
24. English causality
Risk: Because-like relation is inferred from sequence alone.
Ledger move: Do not promote chronology to cause without support.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
25. English irony
Risk: Literal wording is treated as ironic automatically.
Ledger move: Irony requires contextual contradiction or tone evidence.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
26. English reference
Risk: The nearest noun is assumed to be the antecedent.
Ledger move: Test grammar, semantics and discourse focus.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
27. English ‘the’ reference
Risk: A definite noun is assumed to refer to one particular earlier entity.
Ledger move: Identify what makes the referent uniquely recoverable.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
28. English shared knowledge
Risk: A writer assumes the audience knows a background fact.
Ledger move: Distinguish text-given information from world knowledge.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
29. English summary
Risk: A compressed point includes an unstated causal or evaluative link.
Ledger move: Keep only information recoverable from source.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
30. English paraphrase
Risk: A synonym is assumed equivalent in scope or tone.
Ledger move: Check quantifier, modality and connotation.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
31. Mathematics unknown sign
Risk: A variable is treated as positive.
Ledger move: Check domain before dividing, squaring or choosing branch.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
32. Mathematics integer domain
Risk: A quantity is assumed whole-number.
Ledger move: Only enforce if the context makes fractional values impossible.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
33. Mathematics nonzero denominator
Risk: Division assumes denominator is nonzero.
Ledger move: State or test the restriction.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
34. Mathematics exactness
Risk: A displayed decimal is treated as exact.
Ledger move: Check whether it is rounded or measured.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
35. Mathematics independence
Risk: Two equations are treated as independent.
Ledger move: Check whether one is a multiple/rephrasing of the other.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
36. Mathematics scale
Risk: A graph’s visual slope is treated as magnitude.
Ledger move: Read axis scales first.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
37. Mathematics proportionality
Risk: Two quantities increasing together are assumed directly proportional.
Ledger move: Check ratio constancy and origin behaviour.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
38. Mathematics inverse relation
Risk: One rises as another falls, so inverse proportion is assumed.
Ledger move: Check product constancy.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
39. Mathematics symmetry
Risk: Two cases look similar and are assumed equivalent.
Ledger move: Check labels, constraints, signs and direction.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
40. Mathematics monotonicity
Risk: Output is assumed always increasing.
Ledger move: Check range and turning points.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
41. Science causality
Risk: Treatment and outcome differ, so treatment is assumed cause.
Ledger move: Check controls, confounders and design.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
42. Science fair test
Risk: The procedure is called fair because several controls are present.
Ledger move: Name which alternatives remain uncontrolled.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
43. Science detector validity
Risk: A signal is assumed to equal the target.
Ledger move: Check sensitivity and specificity.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
44. Science negative result
Risk: No signal is assumed to mean absence.
Ledger move: Check detection capability and timing.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
45. Science positive result
Risk: A signal is assumed unique to the target.
Ledger move: Check alternative signal sources.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
46. Science mechanism completeness
Risk: One mechanism step is omitted because it feels obvious.
Ledger move: Make the bridge explicit if the explanation depends on it.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
47. Science equilibrium
Risk: A flat graph is assumed to mean equilibrium.
Ledger move: Check turnover, saturation and detector ceiling.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
48. Science local-to-global
Risk: One location is assumed to represent the system.
Ledger move: Check gradients and sampling.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
49. Science short-to-long term
Risk: A short response is assumed to predict long-term outcome.
Ledger move: Check feedback, adaptation and depletion.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
50. Science model range
Risk: A model is assumed valid outside tested conditions.
Ledger move: State boundary conditions and range.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
51. Assumption inherited downstream
Risk: A hidden assumption feeds several later answers.
Ledger move: Mark its dependency blast radius before repair.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
52. Assumption conflict
Risk: Two assumptions cannot both be true.
Ledger move: Resolve the conflict before calculating further.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
53. Assumption made explicit
Risk: Writing the assumption exposes whether it is defensible.
Ledger move: If it looks unreasonable when stated plainly, test it immediately.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
54. Assumption removed
Risk: Try solving without the assumption.
Ledger move: If the answer remains possible, the assumption may be unnecessary.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
55. Assumption tested
Risk: Change or violate the assumption and predict what should change.
Ledger move: A useful assumption creates a testable consequence.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
56. Assumption ledger final rule
Risk: Every load-bearing statement should be classified as given, derived, conventional or assumed.
Ledger move: Unmarked assumptions are the ones most likely to contaminate later reasoning.
For practice, create one response in which the assumption is hidden and another in which it is labelled. Ask what evidence would promote the assumption to a supported derived fact, and what counterexample would invalidate it.
For transfer, change the surface context but preserve the same assumption class. The learner should identify the hidden assumption from the structure rather than remember the wording of the original problem.
Competing explanations
Different assumptions can make the same evidence support different conclusions. Keep plausible alternatives visible until a discriminating observation, hard constraint or source statement removes one. Do not let a convenient assumption win merely because it simplifies the calculation.
Observation versus inference
The given observation or text is not the same as the model built on it. “The graph rises” can be observed; “the relationship is directly proportional” is an inference requiring additional structure. The ledger keeps those layers apart.
Support versus proof
Evidence can support an assumption without proving it universally. A roughly constant rate over one interval does not prove constant rate everywhere. State the range and condition over which the assumption is being used.
Model limits
Some school questions intentionally imply simplifying assumptions through diagrams, conventions or stated models. The ledger is not a demand to reject simplification; it is a method for knowing which simplification is active and where it could fail.
Delayed transfer
Return later with mixed English, Mathematics and Science problems containing one hidden assumption each. Measure whether the learner can classify premises, identify the load-bearing assumption, choose the smallest test or repair and state the model limit without prompts.
Internal learning links
Use the Examination Craft hub, Vol 0112 Evidence Debt, Vol 0140 Proof Obligations, 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
Do not let a hidden assumption masquerade as a given fact. Classify the premise, test it if it carries the answer, and keep later work attached only to assumptions the problem can support.
G2 SEC Learner’s Guide: Open the Vol 0132–0175 hub and subject index.
