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🪤Thinking Traps
Level 1Free
Classic Traps
Walk into the classics — intuition, probability, statistics, decision and logic traps — get fooled once, get immune for good.
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Monty Hall Problem Quiz: Should You Switch Doors?
The probability puzzle that humiliates smart people
Survivorship Bias Quiz: Can You See the Planes That Never Came Back?
12 questions. Find the planes that never made it home.
LSAT Logical Reasoning Flaw Questions: Free Practice Quiz
12 LSAT-style flaw questions · 5 choices each · full explanations
Assumption Questions: LSAT & GMAT Practice Quiz (with the Negation Test)
Find the load-bearing wall the argument never mentions.
Strengthen & Weaken Questions: LSAT & GMAT Practice Quiz
Find the gap first. Then decide: patch it or pry it open.
Method of Reasoning Questions: LSAT & GMAT Practice Quiz
Describe the move. Do not grade it.
Free Logical Reasoning Test: 12 Practice Questions with Answers
Judge only what the passage says. That one rule is most of the test.
GRE Analyze an Argument Was Retired in 2023 — What to Practice Instead
The essay is gone. The skill still gets tested.
Correlation vs Causation Quiz
Correlation whispers; causation has to prove itself.
Necessary vs. Sufficient Conditions Quiz
Hurdles are not guarantees. Arrows have directions.
Behavioral Economics Quiz: Can You Beat the Biases?
12 Nobel-level experiments. See how far you are from Homo economicus.
Base Rate Fallacy Quiz: Can You Beat the Denominator?
Positive ≠ sick, alert ≠ fraud — see if the denominator fools you.