Have you noticed the frequency with which conservatives and assorted right-wingers are caught denying they said something revolting when in fact they did say that thing.
George W. Bush, Dick Cheney, Ronald Reagan, John Boehner, Dan Quayle.
Let's face it: These guys are dumb. They just aren't particularly intelligent. Whatever native intellect they once possessed was long ago obliterated by the blind hatreds and bigotries that infest right-wing thinking in the United States.
We need a new term — Plausible Stupidity. Incidents of right-wing Plausible Stupidity are typically characterized by a flat denial by the wingnut even when confronted with direct evidence.