The Wason Selection Task

Question 2

You're still working as a quality control technician for a card games manufacturer (it's a good job!). But now you have to check a different rule:

If a card has the letter S on one side, then it has the number 3 on the other side.

You already know for certain that every card has a letter on one side and a number on the other side. Please indicate, taking this into account, which card or cards you definitely need to turn over, and only that or those cards, in order to determine whether the rule is broken in the case of each of the four cards below. (To indicate that it is necessary to turn over a card, simply "select" the card by clicking in the little box beneath it.)
 






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Make your selection(s), then press the Submit button in order to proceed to the final question.

Question 2 of 3

Really Deep Thought

Where, not the person's own character, but the traditions of customs of other people are the rule of conduct, there is wanting one of the principal ingredients of human happiness, and quite the chief ingredient of individual and social progress.
   --John Stuart Mill.



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