An Algorithmic Lucidity

"So, an engineer and a mathematician are leaving a lecture. The engineer says, 'I just don't understand how you can visualize objects in seven-dimensional space.' The mathematician says, 'Oh, that's easy. You just visualize the n-dimensional case, and then set n equal to seven.'"

"I've never liked that joke. The punchline is intended to be absurd, but it's not: that's actually how you do it."

"Really?"

"Okay, fine. You visualize the three-dimensional case, and then set three equal to seven."

This one is a classic that I love to repeat; stop me if you've heard it before. Knock, knock.

"Who's there?"

Truly repentant are those.

"Truly repentant are those who?"

Truly repentant are those who, when the temptation to sin is repeated, refrain from sinning!