“Never get into an argument you’ve already won” is one of my favorite Crusty Delta Captain-isms I’ve picked up along the way.

Best story on topic that I’ve heard—possibly apocryphal, but don’t care:

Captain: We’ll need X,000 pounds more fuel due to _______ , please.
Dispatch: Can’t / won’t do that because <reasons>.
C; I understand & even concur with those reasons, however, I’ve determined that we’ll need those X,000 pounds for a safety margin.
D: Sorry, Captain—unable.
C: OK, there are two ways we can resolve this. One, do it my way & you give me the gas….
D: <wait>
D: <silence stretches>
D: <tick tick tick tick….>
D: OK, what’s the other way?
C: Well, that will be between you & whover you find to replace me—because I’m not going without the gas.
D: Amending your release now, Captain….