From Star Trek VI: The Undiscovered Country
[Watching a replay of the torpedo hit
Commander Pavel Chekov
It is Enterprise. We fired them.
Captain Montgomery 'Scotty' Scott
That is not possible! All weapons visually accounted for, sir.
An ancestor of mine maintained that when you eliminate the impossible, whatever remains, however improbable, must be the truth. If we did not fire those torpedoes, another ship did.