The rule of the Wason four-card problem is, If there is a vowel ...

[krzymel]

The rule of the Wason four-card problem is, If there is a vowel on one side, then there is an even number on the other side. Let's say you are presented with A, 8, M, and 13, each showing on one of four cards. To see if the rule is valid, you would have to turn over the cards showing
 
  a. 8 and M.
  b. A and M.
  c. A and 13.
  d. 8 and 13.

Question 2

One reason that most people do not easily solve the original (abstract) version of the Wason four-card problem is that they
 
  a. ignore the falsification principle.
  b. are influenced by the atmosphere effect.
  c. confuse the ideas of validity and truth.
  d. incorrectly apply the permission schema.

[trog]

Answer to Question 1

c

Answer to Question 2

a