Quotes About Logic

a real danger by giving it an absurd name, the designations were often facetious: the Godel Gremlin, the Mandelbrot Maze, the Combinatorial Catastrophe, the Transfinite Trap, the Conway Conundrum, the Turing Torpedo, the Lorenz Labyrinth, the Boolean Bomb, the Shannon Snare, the Cantor Cataclysm…

The simplest solution is always best.

Quando aquele mar de fogo se expandiu abaixo dele, Bowman devia ter sentido medo, mas, curiosamente, agora sentia apenas uma ligeira apreensão. Não que sua mente estivesse entorpecida de maravilhas. A lógica lhe dizia que ele certamente estava sob a proteção de alguma inteligência controladora e quase onipotente.

My dear Watson, said [Sherlock Holmes], I cannot agree with those who rank modesty among the virtues. To the logician all things should be seen exactly as they are, and to underestimate one's self is as much a departure from truth as to exaggerate one's own powers.

It was easier to know it than to explain why I know it. If you were asked to prove that two and two made four, you might find some difficulty, and yet you are quite sure of the fact. ~ Sherlock Holmes

Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." - Sherlock Homes

But love is an emotional thing, and whatever is emotional is opposed to that true cold reason which I place above all things.

When you have excluded the impossible, whatever remains, however improbable, must be the truth.

Watson, you can see everything. You fail, however, to reason from what you see.

I never guess. It is a shocking habit - destructive to the logical faculty.

Problems may be solved in the study which have baffled all those who have sought a solution by the aid of their senses. To carry the art, however, to its highest pitch, it is necessary that the reasoner should be able to use all the facts which have come to his knowledge; and this in itself implies, as you will readily see, a possession of all knowledge, which, even in these days of free education and encyclopaedias, is a somewhat rare accomplishment.

Never theorize before you have data.Invariably you end up twisting facts to suit theories instead of theories to suit facts. -Sherlock holmes

From a drop of water," said the writer, "a logical man could understand oceans and waterfalls without having ever seen or heard of them.

From a drop of water, said the writer, a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other. So all life is a great chain, the nature of which is known whenever we are shown a single link of it.

No ghosts need apply. - Sherlock Holmes: The Adventure of the Sussex Vampire

The ideal reasoner would, when he had once been shown a single fact in all its bearings, deduce from it not only all the chain of events which led up to it but also the results which would follow from it.

I had," said he, "come to an entirely erroneous conclusion which shows, my dear Watson, how dangerous it always is to reason from insufficient data.

WATSON: Then you are yourself inclining to the supernatural explanation.      HOLMES: if Dr. Mortimer's surmise should be correct, and we are dealing with forces outside the ordinary laws of Nature, there is an end of our investigation. But we are bound to exhaust all other hypotheses before falling back upon this one.

Eliminate all other factors, and the one which remains must be the truth.

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

My brain has always governed my heart Sherlock Holmes

He was, I take it, the most perfect reasoning and observing machine that the world has seen, but as a lover he would have placed himself in a false position.

It is not really difficult to construct a series of inferences, each dependent upon its predecessor and each simple in itself. If, after doing so, one simply knocks out all the central inferences and presents one's audience with the starting-point and the conclusion, one may produce a startling, though perhaps a meretricious, effect.

Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.