"The Dark Lord, or his father? I sincerely doubt the latter. As to the former, you could ask Minerva; I wasn't around for the war's aftermath."
He blinks. "Of?"
"Quite," he agrees, "But many aren't rational enough to think that through even on an ordinary day, let alone while in the grips of that sort of turmoil." Q is clearly not telling him something; he'll just have to be patient.
"Since '83." Feeling this needs explanation, "Between lesson plans, House duties, classroom catastrophe management, and correcting essays, as a new teacher, it took some time to perfect."