Context (Hacker is Britain's Prime Minister, Sir Humphrey is his chief subordinate, the Russians are their enemy in the Cold War)

Double Context: This quote is from "Yes Prime Minister", a british comedy show.

Sir Humphrey: Bernard, what is the purpose of our defence policy?

Bernard: To defend Britain.

Sir Humphrey: No, Bernard. It is to make people believe Britain is defended.

Bernard: The Russians?

Sir Humphrey: Not the Russians, the British! The Russians know it's not.