Quotes about Deduction

The puzzling thing is that there is really a curious coincidence between astrological and psychological facts, so that one can isolate time from the characteristics of an individual, and also, one can deduce characteristics from a certain time....

The process of observing the facts of reality and of integrating them into concepts is, in essence, a process of induction. The process of subsuming new instances under a known concept is, in essence, a process of deduction.

One cannot really argue with a mathematical theorem.

You know my method. It is founded upon the observation of trifles.

Beyond the obvious facts that he has at some time done manual labour, that he takes snuff, that he is a Freemason, that he has been in China, and that he has done a considerable amount of writing lately, I can deduce nothing else.

Mr. Sherlock Holmes...was usually very late in the mornings, save upon those not infrequent occasions when he was up all night.

I believe you are a wizard, Mr. Holmes.

It would be superfluous to drive us mad, my dear Watson, said he. A candid observer would certainly declare that we were so already before we embarked upon so wild an experiment.

His conclusions were as infallible as so many propositions of Euclid. So startling would his results appear to the uninitiated that until they learned the processes by which he had arrived at them they might well consider him as a necromancer.

Holmes held out a small chip with the letters NN and a space of clear wood after them.

It is all in the way of professional experience. - Sherlock Holmes

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