Ad Nauseam

The oblique paradox of propaganda is that the lie in the throat
becomes, by repetition, the truth in the heart. 

— John Grierson

Not only is Obama's birth certificate fake, but Geico saves you 15%.

The statements exemplify the fallacy known as argumentum ad nauseam—proof by repeated assertion.

As advertisers and birthers believe, by endlessly repeating a statement, you can drive audiences beyond the brink of caring to challenge it. They're too sick to contradict.

And when the challenges cease, hearts become vulnerable.

The argumentum ad nauseam becomes evidence of its own truth.