A Simple Logical Puzzle That Shows How Illogical People Are

Re:A Simple Logical Puzzle That Shows How Illogical People Are by greggyb on Friday May 22, 2015 @03:14PM (#9590370)

I somehow split the difference on figuring out the logic and following the wrong intuition.

I took as truth each card has a color on one side and a number on the other (see others' comments for where this could be construed as part of the thing you must prove).

I knew I must flip the eight to confirm the color on its back.

I intuited that I should flip the blue.

I thought for a moment before deciding on my final answer, and concluded that I must flip the green to ensure that it does not have an even on the back.

I pondered a moment and somehow decided that order is important, and so that I should flip the 8 first, then the green, and finally the blue in that order (not sure on how I arrived at requiring an order).

I selected 8, blue, green, and was informed I was incorrect.

I thought and realized that the truth of the proposition did not exclude the possibility of odds having blue backs.

I arrived at the correct conclusion that I must flip the 8 and the green.

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Re:A Simple Logical Puzzle That Shows How Illogical People Are by dragontamer on Friday May 22, 2015 @03:17PM (#9590394)

I was able to determine "flip the 8" due to my study of logic and AI: Modus ponens.

Unfortunately, I forgot about Modus Tollens, and forgot about the "Green" card.

The fact of the matter remains: the typical human does not study basic logic. And basic logic is hard to do without proper study. In fact, verifying that you must flip the 8 and green basically requires the human to "make the leap" and fully understand Modus Ponens and Modus Tollens.

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