Lisa: I was in the library at the time, but Janey told me that
Principal Skinner and Bart's teacher, Mrs. -- what's her
name?
Marge: Krabappel?
Lisa: Yeah, Krabappel. They were naked in the closet together.
Marge: [gasps] Oh, my goodness!
Homer: Wait a minute. Bart's teacher is named Krabappel? I've been
calling her Crandall. Why didn't someone tell me? Oh, I've
been making an idiot out of myself! [runs out of the room]
-- Right conclusion, wrong reason,
"Grade School Confidential"