Two Irishmen were working on the roof of a building one day when one
made a mis-step and fell to the ground; the other leaned over and
called: "Are ye dead or alive, Mike?"
"I'm alive," said Mike, feebly.
"Sure, yer such a liar I don't know whether to believe ye or not."
"Well, then, I must be dead," said Mike, "for ye would never dare to
call me a liar if I were alive."