Cum hoc ergo propter hoc, lat. A skeptical proposition that comes down to us in the dead language of an empire long extinct, and essentially means: "It might be possible for stupid people to make smart policy."

2008 D LUSKIN via WaPo 12 Sep "The sentiment of the majority is always wrong at key turning points. And the majority is plenty pessimistic right now. That suggests that we're on the brink not of recession, but of accelerating prosperity."