"You don't argue with a four-year old about why he shouldn't eat candy for dinner. You don't punch a mentally handicapped guy even if he punches you first. And you don't argue when a women tells you she's only making 80 cents to your dollar. It's the path of least resistance. You save your energy for more important battles."

Source: Scott Adams (1996). “The Dilbert principle: a cubicle's-eye view of bosses, meetings, management fads & other workplace afflictions”