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1.
The preservation of the sacred and universally recognized values of improvisational theatre. It applies to both the performance of improv and the conduct of an improv troupe.
Man #1: Hey man, I thought of a really funny joke. I might save it for a show

Man #2: INTEGRITY OF IMPROV!

Man #1: Whoa, calm down! I'll forget it. But can I bring my friend to the party AFTER the show?

Man #2; INTEGRITY OF IMPROV!
by Phrank of Improv 101 November 19, 2010