I just watched Clue (The Movie) again tonight. I love it. Whenever you rewatch a film, you notice something new, but this time I noticed something which was obvious as well as new: it was written by Jonathan Lynn, of Yes [Prime] Minister fame. I don’t know why I didn’t see it before! Compare Wadsworth to Sir Humphrey:

Mustard: All right, look. Pay attention, everybody. Wadsworth, am I right in thinking there is nobody else in this house?
Wadsworth: Mmm, no.
Mustard: Then there IS someone else in this house?
Wadsworth: No, sorry. I said “no,” meaning “yes.”
Mustard: “‘No,’ meaning ‘yes’”? Look, I want a straight answer. Is there someone else or isn’t there, yes or no?
Wadsworth: Um, no.
Mustard: “No,” there IS, or “no,” there ISN’T?
Wadsworth: Yes.