"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."
Sir Arthur Conan Doyle/ Sherlock Holmes - The Sign of the Four
Spock on Star Trek - Star Trek VI: The Undiscovered Country.
The apophatic creed - see Taleb
Related maxim from Physics:
“The observation of a state which is improbable in the history of a system requires explanation in terms of a preceding state of interaction.” - Direction Of Time, Hans Reichenbach