Wason Selection Task

There are four cards on a table. Each card has a number on one side and a letter on the other. The visible faces of the cards show W, V, 42, and 7.

Which card or cards do you need to turn over to check whether the following statement is true:

“If a card has a V on one face, then the number on the opposite face is greater than 20”

Now let’s try another problem and see if it’s easier.

There are four cards on a table. Each card has person’s age on one side, and that person’s drink on the other. The visible faces of the cards show Water, Vodka, 42, and 7.

Which card or cards do you need to turn over to check whether the following statement is true:

“If a card has Vodka on one face, then the age on the opposite face is at least 21”