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Legally Blonde (Posted on 2016-12-19) Difficulty: 1 of 5
You meet three blonde women, A, B, and C. Each of them is either a knight or a liar. Exactly one of them is Elle Woods.

A:I am Elle Woods.
B:I am Elle Woods.
C:At least two of us are liars.

What are A, B, and C, and who is Elle Woods?

No Solution Yet Submitted by Math Man    
Rating: 3.0000 (2 votes)

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Solution Solution Comment 8 of 8 |
Looking at C, if C is a knight, then A and B must both be liars to make C's statement true.  Which makes C Elle Woods.

But if C is a liar, then by C's statement, there can only be one liar which is C.  But A and B's statements contradict each other which would make one of them a liar.

Therefore, C must be a knight, and A and B liars.  So C is Elle Woods.

  Posted by hoodat on 2017-04-14 23:27:50
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