There are three kinds of liars:
1. The man whom others can't believe. He is harmless. Let him alone.
2. The man who can't believe others. He has probably made a careful study of human nature. If you don't put him in jail, he will find out that you are a hypocrite.
3. The man who can't believe himself. He is a cautious individual. Encourage him.
Two Irishmen were working on the roof of a building one day when one made a misstep and fell to the ground. The other leaned over and called:
"Are yez dead or alive, Mike?"
"Oi'm alive," said Mike feebly.
"Sure you're such a liar Oi don't know whether to belave yez or not."
"Well, then, Oi must be dead," said Mike, "for yez would never dare to call me a liar if Oi wor aloive."