- Maj. Bone: You should have thought of that before it happened.
- Peter Wyckham: How could I have thought of it before it happened when it hasn't happened?
- Landlord: Well, how far is it?
- Maj. Bone: Well, how do I know? If I knew how far it was, I'd know the name of the place, wouldn't I?
- Landlord: Not necessarily.
- Maj. Bone: What?
- Landlord: Not necessarily. Now take China, for instance.
- Maj. Bone: What's wrong with China?
- Landlord: You know where China is, but you don't know how far it is, not strictly speaking.