There’s the old story about the professor who was speaking about grammar.
“You realize,” he said, “that two negatives make a positive. However, there is never a case in which two positives make a negative.”
From the back of the hall came an anonymous voice which said,
I was raised Southern Baptist back before Southern Baptists went nuts. I know lying hypocrites when I see them.
God knows, I’ve seen enough of them.
Addendum, Later That Same Morning: