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Old 11-09-2015, 01:15 PM
fakpuppet fakpuppet is offline
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Join Date: Oct 2015
Posts: 5

I am pretty sure this puzzle is solvable under a specific constraint and it is cleat that it's not explicitly given in the context of the problem's statement.

For example, when asked to choose between two colors offered, any person will either answer with a specific color or with "neither". When lying a person will always choose to answer with a concrete color rather than answering with "neither" (even though "neither" would also constitute a valid untruthful answer). The only occasions where you will be given "neither" as an answer are those when the person is telling the truth and is offered choices neither of which would make a truthful answer (such as asking Alan whether his hat was yellow or green when his hat is in fact blue for example; he would have to answer with "neither" when answering truthuflly).
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