perplexus.info :: Logic : A Logic Accusation

A Logic Accusation (Posted on 2003-10-01)

In an island peopled by Knights (who always say the truth) and Liars (who obviously always lie), two persons spoke about each other.

A said: "B would say I lie."

B said: "That is true."

Can anything be deduced as to what kind is each of them?

See The Solution Submitted by Federico Kereki

Rating: 2.8667 (15 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

This should be in Liars and Knights.

Comment 17 of 17 |

B agrees with A, so B would not say that A lies. Therefore, A is a liar. Since B agrees with A, B is also a liar. They are both liars.

Posted by Math Man on 2014-08-03 15:03:00

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