One day you meet three persons, each either a Knight or a Liar. You ask "How many of you are knights?", and the first person answers "Grok!".

Not understanding, you ask the second one "What does 'Grok' mean?", and he answers "One", but then the third one cries out "That's false!".

What can you tell about each person, if anything?

It can be deduced that the second person is a Liar and the third is a Knight, yet the first person can not be deduced as either knight or liar by the given conversation. 

The meaning of "Grok" remains unknown yet the cardinal number "One" can be eliminated as its meaning as we know the second person is a liar and he stated that was its meaning. 

Posted by Dej Mar on 2007-06-30 21:19:48