The Wason selection task is a logic puzzle devised by Peter Cathcart Wason in 1966. It is one of the most famous tasks in the study of deductive reasoning. An example of the puzzle is: You are shown a set of four cards placed on a table, each of which has a number on one side and a colored patch on the other side.

What does the Wason selection task prove?

The Wason selection task was devised by Peter Wason in 1966. ... The Wason selection test therefore evaluates subjects' ability to find facts that violate a hypothesis, specifically a conditional hypothesis of the form If P then Q. In Wason's test, four "facts" are presented in the form of cards.

What is the right answer to the Wason selection task?

The correct response is to turn over the 8 card and the brown card.