Reverse Turing test
Prove you're human.
Seven classic puzzles from psychology and maths. Each one has an answer that feels obviously right and isn't. Machines tend to sail through them. Humans tend to trip, which is how you know you're one of us.
Where these puzzles come from
- Questions 1–3: Shane Frederick, “Cognitive Reflection and Decision Making”, Journal of Economic Perspectives 19(4), 2005
- Question 4: Erickson & Mattson, “From words to meaning: A semantic illusion”, Journal of Verbal Learning and Verbal Behavior, 1981
- Question 5: Tversky & Kahneman, “Extensional versus intuitive reasoning: The conjunction fallacy in probability judgment”, Psychological Review, 1983
- Question 6: the Monty Hall problem, made famous by Marilyn vos Savant's column in Parade magazine, 1990