The Moon is a Harsh Mistress

by Robert A. Heinlein

Mike indulged in phony answers with skewed logic, or pranks like issuing pay cheque to a janitor in Authority’s Luna City office for AS-$10,000,000,000,000,185.15—last five digits being correct amount.

Mike, you want to discuss nature of humor. Are two types of jokes. One sort goes on being funny forever. Other sort is funny once. Second time it’s dull. This joke is second sort. Use it once, you’re a wit. Use twice, you’re a halfwit.”