A logician visits a distant planet inhabited by two groups of aliens, compulsive liars and faithful truth-tellers.
She comes to a fork in a road - one road goes to the left, the other to the right. She meets two aliens there, one a liar, the other a truth-teller... but she doesn't know which is which.
The logician must ask just one Yes/No question to discover which road she should take to reach their leader. She thinks for a moment and then asks her question.
What question might she have asked?
Post your theories and ideas as comments to this post...
9 November 2014
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