presume nothing Autore: Arthur Conan Doyle Copy Quote More from Arthur Conan Doyle “Individuals vary, but percentages remain constant. So says the statistician.” “Circumstantial evidence is a very tricky thing. It may seem to point very strai…” “You cannot see the lettuce and the dressing without suspecting a salad.” “Its invisibility, and the mystery which was attached to it, made this organizat…”