Circumstantial evidence is occasionally very convincing, as when you find a trout in the milk, to quote Thoreau's example.

Circumstantial evidence is a very tricky thing. It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different

It is stupidity rather than courage to refuse to recognize danger when it is close upon you.

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

Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.

How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?