Posted by Pamela on June 23, 2006
In Reply to: You can't kid a kidder posted by Lewis on June 23, 2006
: : What is the origin and meaning of the oxymoronic phrase "can't fool the fool" if any?
: it is a variation on the idea of the "poacher turned game-keeper" idea or "set a thief to catch a thief" - i.e. that somebody who is dishonest can spot and catch out another one. it is the opposite of 'honour amongst thieves', I suppose.
"You can't con the con" is the one I've heard. Pamela