“It is impossible to defeat an ignorant man in argument.” –William G. McAdoo
Which quote reminds me of a story I heard back in the 60s:
A man was driving on a one lane bridge when he met another one driving in the opposite direction. The second man said, “I never back up for and idiot. ”
“I always do,” said the first. He promptly threw the gears into reverse and backed off the bridge.