“The problem ain't what people know. It's what people know that ain't so that's the problem.”
“It's not what we don't know that hurts. It's what we know that ain't so.”
“Ignorance lies not in the things you don't know, but in the things you know that ain't so.”
“Things ain't what they used to be and probably never was.”
“I'll bet you the time ain't far off when a woman won't know any more than a man.”
“Common sense ain't common.”
“Buy land. They ain't making any more of the stuff.”