Category: Science
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PSLE Science Reality Lab Vol No.332 | “This Study Was Preregistered” — Does That Mean the Result Must Be Correct?
PSLE Science Reality Lab: learn how preregistration makes a study plan visible before results are known, while leaving method quality, execution, analysis and conclusion strength to be evaluated separately.
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PSLE Science Reality Lab Vol No.331 | “SPF 50” — Does That Mean 50 Times Longer in the Sun?
PSLE Science Reality Lab: learn why SPF is a standardized sunburn-protection ratio based on ultraviolet exposure, not a stopwatch that multiplies safe time in the sun.
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PSLE Science Reality Lab Vol No.330 | “NSF/ANSI 53 Certified Water Filter” — Does It Remove Every Contaminant?
PSLE Science Reality Lab: learn why water-filter certification supports specific verified contaminant-reduction claims under a defined standard, not a universal claim that every contaminant is removed.
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PSLE Science Reality Lab Vol No.329 | “Streamflow = 10th Percentile” — Is the River Flowing at 10% of Normal?
PSLE Science Reality Lab: learn why a streamflow percentile is a historical rank for a stated comparison period, not a claim that river discharge equals that percentage of normal flow.
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PSLE Science Reality Lab Vol No.328 | “Fire Radiative Power = 50 MW” — Is the Whole Wildfire Producing Exactly 50 MW?
PSLE Science Reality Lab: learn how satellite fire radiative power in megawatts describes a detected pixel’s radiative power at an observation time, not the whole fire’s total heat output, area or permanent intensity.
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PSLE Science Reality Lab Vol No.327 | “ENERGY STAR Score = 75” — Is the Building 75% Efficient?
PSLE Science Reality Lab: learn why an ENERGY STAR score of 75 is a normalized benchmark against similar buildings rather than a statement that a building is 75% efficient.
