"It's not enough for a program to work, it has to work for the right reasons. #Code working for the wrong reasons is code that's going to break when you least expect it."
https://buttondown.com/hillelwayne/archive/be-suspicious-of-success/
"And since "correct for right reasons" is a much narrower target than "correct for any possible reason", we can't assume our first success is actually our intended success."