No severity of punishment deters when detection is uncertain, as it always must be.
—George Bernard Shaw (1856–1950)
“It is of the highest importance in the art of detection to be able to recognise out of a number of facts which are incidental and which are vital.... I would call your attention to the curious incident of the dog in the night-time.”
“The dog did nothing in the night-time.”
“That was the curious incident.”
—Sir Arthur Conan Doyle (1859–1930)
There is not to be found, in all history, any miracle attested by a sufficient number of men, of such unquestioned good sense, education, and learning, as to secure us against all delusion in themselves ... beyond all suspicion of any design to deceive others ... and at the same time attesting facts, performed in such a public manner, and in so celebrated a part of the world, as to render the detection unavoidable.
—David Hume (1711–1776)