A logic problem by Soumava Pal
Logic
Level
2
If these statements are all logical, what conclusion can you draw from here?
Select the option Invalid if there is some logical flaw here.
Invalid
Either Mickey Mouse or Donald Duck or both do exist in real life.
Mickey Mouse does exist in real life.
Donald Duck does exist in real life.
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1 solution
If the third statement is False,
then what it says should be False, that is, none of the statements in that box is False. So all the three statements are True. But that means the third statement itself is True.
So the third statement should be True. So at least one of the first two statements is False. Now if you think this way you might be tempted to answer 'Either Mickey Mouse or Donald Duck or both do exist in real life.' But we made an assumption in the beginning that the sentence marked '3' is a 'statement'. But that is wrong. Because only a statement can have truth values like True or False. Sentence 3 is a classic example of a 'self-referential sentence' in disguise which is never considered a statement. So it is not logical to talk about its truth value at all.