quod erat demostratem

ego sum discipulus optimus. ego non sum discipulus malus. saxtus est discipulus malus.
"Veto!"

Oh right, and it's a math term. It means "what was to be demonstrated", used in proofs of innumerable math proofs.

x=-b+-root(b^2-4ac)/2a

QED (Quod Erat Demonstratem)

by [Dunbar]** February 11, 2004