Re:A Simple Logical Puzzle That Shows How Illogical People Are
by greggyb on Saturday May 23, 2015 @08:15PM
(#9594884)
In the setup, you are presented with four actual cards in front of you, two where you can see a number, and two where you can see a color. This is verifiable with your senses. You are then told two statements about these cards and asked to verify the second statement.
As OP of this thread pointed out, the card with 5 must be checked, because it's possible that it has an even number on its reverse side.
I originally misinterpreted the OP as saying that both (1) and (2) must be verified. You can see the two sibling branches that explore both of these in much more depth and back and forth.
1) Each card has a number on one side and a color on the other side.
2) Pick the minimum numbers of cards needed to verify the statement "If a card has an even number, then its color is blue".
>Since you know you can't trust the second thing you are told about the cards, why should you assume that the first thing you are told about the cards is true?
This reading doesn't make any sense. If you were indeed given (1) and (2) in that form, and indeed couldn't trust them both, then there would be no quiz at all. Just 2 random sentenses that might or might not be true.