Certainly one can never be too sure about those sort of things.
4 seconds sound clip from the Dr. Strangelove movie soundboard.
You can hear this line at 00:58:30 in the Blu-ray version of the movie.
Quote context
[...]
- Those boys were like my children. Now they've let me down.
- No, no, Jack, not a bit of it.
- No, I'm sure they all gave of their very best.
- And I'm equally sure they all died thinking of you - every man Jack of them - Jack.
- Supposing a bit of water has gone off, eh?
- Certainly one can never be too sure about those sort of things.
- I drink a lot of water, you know. I'm what you might call a water man, Jack. That's what I am.
- Were you ever a prisoner of war?
- Well, Jack, the time's running very...
[...]