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

How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it, except the pleasure of seeing it.
   --Adam Smith.


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