Al, Joe, and BethLogic puzzles require you to think. You will have to be logical in your reasoning.
Al says Beth is lying, Beth says Joe is lying, Joe accuses both of them of lying.
Who is telling the truth?
Joe can't be telling the truth because then
Beth would be lying, and Al's statement (which is also a lie) would mean that Beth is telling the truth. These two facts contradict each other. Therefore Joe is lying, which means that Beth is telling the truth, which in turn means that Al is lying.
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