Each of Alan and Ben is a knight, a knave or a liar. (An explanation of the three types is given here.)

Al says:
1. Ben and I do not have the same standard of veracity.
2. I never speak truthfully.

Ben says: 
1. Al is not a liar. 
2. I am not a liar.

Determine the type of each of Al and Ben.

Al says:     KNAVE (T,L)

1. Ben and I do not have the same standard of veracity.
2. I never speak truthfully.

Ben says:        KNIGHT (T,T)

1. Al is not a liar. 
2. I am not a liar.

Posted by Ady TZIDON on 2013-04-15 10:57:28