Logic
"Man has such a predilection for systems and abstract deductions that he is ready to distort the truth intentionally, he is ready to deny the evidence of his senses only to justify his logic." - Fyodor Dostoyevsky, Notes from Underground
"[W]hen you have eliminated the impossible, whatever remains, however improbable, must be the truth." - Doyle, Sir Arthur Conan spoken by Sherlock Holmes