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Home > Logic > Liars and Knights
Which is Which III (Posted on 2014-01-20) Difficulty: 2 of 5
In an island there are three types -- knights, liars and knaves. Knights always speak the truth, liars always speak falsely and, knaves strictly alternate between a true statement and a false statement - albeit not necessarily in this order.

A visitor to the island was faced with three such inhabitants Al, Ben and Cal and he wanted to find out their types.

The visitorís questioning went as follows:

Visitor: Al, which sort are you?
Al: I am a knight.
Visitor: Ben, what are you?
Ben: I am a liar.
Visitor: So, Ben, was Al lying?
Ben: No.
Visitor: Cal, what sort are you? What is Al?
Cal: I am a knight. Al is a knave.

Which is which?

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
SolutionLiar, Liar (spoiler)Steve Herman2014-01-20 10:44:11
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