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Follow the Rules!

Logic puzzles require you to think. You will have to be logical in your reasoning.


Puzzle ID:#40706
Fun:** (2.02)
Difficulty:*** (2.12)
Submitted By:kratsgus***




You have four cards on the table:

[ BRAIN ] [ strain ] [ MIND ] [ teaser ]

You know that each card has capitalized letters on one side and lowercase letters on the other. There is a rule that says, "If a card has 'BRAIN' on one side, it must have 'strain' on the other."

Which card(s) must be turned over to make sure that the rule was not violated?


Two cards: [ BRAIN ] and [ teaser ].

Let's examine this card by card...

[ BRAIN ] - this must have [ strain ] on the other side or else we would violate the rule, therefore we must turn this card over.

[ strain ] - this "can" have but doesn't require [ BRAIN ] on the other side. If it does, the rule is not violated. If it doesn't, the rule is still not violated. Therefore, we do not need to turn this card over.

[ MIND ] - will not violate the rule since it was stated that lowercase must be on the other side of this card. We do not need to turn this over.

[ teaser ] - this can violate the rule. First situation is not having [ BRAIN ] on the other side which does not violate the rule. Second situation is having [ BRAIN ] on the other side which DOES violate the rule. Therefore, we need to turn this one over too.


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