Farce treats the improbable as probable, the impossible as possible.

Fantasy is the impossible made probable. Science Fiction is the improbable made possible.

The impossible often has a kind of integrity to it which the merely improbable lacks. How often have you been presented with an apparently rational explanation of something that works in all respects other than one, which is just that it is hopelessly improbable? Your instinct is to say, 'Yes, but he or she simply wouldn't do that.

In the best farce today we start with some absurd premise as to character or situation, but if the premises be once granted we move logically enough to the ending.

With God, the word ‘impossible’ is itself impossible.

When you have eliminated the impossible, whatever remains, however improbable, must be the truth.