Bart: Somebody ought to ruin Gabbo's career the way he ruined
Krusty's.
Lisa: Two wrongs don't make a right, Bart.
Bart: Yes they do.
Lisa: No they don't.
Bart: Yes they do!
Lisa: No they don't!
Bart: Yes they do!!
Lisa: Daaaad!
Homer: Two wrongs make a right, Lisa.
-- "Krusty Gets Kancelled"