“When the impossible is eliminated, whatever remains, however improbable, is the solution ... unless you're mistaken as to just what is and what isn't impossible.”

“When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.”

“Sherlock Holmes observed that once you have eliminated the impossible then whatever remains, however improbable, must be the answer. I, however, do not like to eliminate the impossible.”

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

“Once you've ruled out the impossible then whatever is left, however improbable, must be the truth. The problem lay in working out what was impossible, of course. That was the trick, all right. There was also the curious incident of the orangutan in the night-time.”

“When you get rid of the impossible, what's left is the only answer, no matter how improbable.”