“You were right” are three words your parents will remember longer than the argument.

Admitting a parent was right costs a few seconds and buys something out of all proportion. They have spent years being argued with and are mostly braced for it, so the sentence lands somewhere nothing else reaches. It also ends the old argument in a way that winning never does.

Pick one thing your mom or dad turned out to be right about and say so plainly, with no joke attached. There is no need for a speech. Then notice what it does to the next conversation you have with them.