Quotes About Logic

Arthur Conan Doyle

We have got to the deductions and the inferences," said Lestrade, winking at me. "I find it hard enough to tackle facts, Holmes, without flying away after theories and fancies." "You are right," said Holmes demurely; "you do find it very hard to tackle the facts.

Es un craso error teorizar antes de tener datos. Inconscientemente, uno empieza a moldear los hechos para que se ajusten a las teorías, en lugar de ajustar las teorías a los hechos.

Esto sí es un misterio. ¿Qué cree que significa? —Aún no dispongo de esos datos. Es un error capital teorizar antes de disponer de información. Sin darse cuenta, uno empieza a deformar los hechos para que se ajusten a las teorías, en lugar de ajustar las teorías a los hechos.

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. Like all other arts, the Science of Deduction and Analysis is one which can only be acquired by long and patient study nor is life long enough to allow any mortal to attain the highest possible perfection in it.

Like all other arts, the Science of Deduction and Analysis is one which can only be acquired by long and patient study nor is life long enough to allow any mortal to attain the highest possible perfection in it.

Arthur Conan Doyle

Casi todo el mundo, ante una sucesión de hechos, acertará a colegir qué se sigue de ellos... Los distintos acontecimientos son percibidos por la inteligencia, en la que, ya organizados, apuntan a un resultado. A partir de éste, sin embargo, pocas gentes saben recorrer el camino contrario, es decir, el de los pasos cuya sucesión condujo al punto final. A semejante virtud deductiva llamo razonar hacia atrás o analíticamente

No data yet," he answered. "It is a capital mistake to theorize before you have all the evidence. It biases the judgment.

Data! data! data!" he cried impatiently. "I can't make bricks without clay.

Arthur Conan Doyle

Arthur Conan Doyle

It would be superfluous to drive us mad, my dear Watson

solving a problem of this sort, the grand thing is to be able to reason backward.

I can see nothing," said I, handing it back to my friend. "On the contrary, Watson, you can see everything. You fail, however, to reason from what you see. You are too timid in drawing your inferences.

In solving a problem of this sort, the grand thing is to be able to reason backwards. That

It is a capital mistake to theorize before one has data.

É um grande erro teorizar antes de ter todos os indícios. Prejudica o raciocínio.

Arthur Conan Doyle

Quien se guiase por la lógica podría inferir de una gota de agua la existencia de un océano Atlántico o de un Niágara sin necesidad de haberlos visto u oído hablar de ellos. Toda la vida es, asimismo, una cadena cuya naturaleza conoceremos siempre a partir de uno solo de sus eslabones.

We balance probabilities and choose the most likely. It is the scientific use of the imagination.

When a fact appears to be opposed to a long train of deductions, it invariably proves to be capable of bearing some other interpretation. (Sherlock)

Es un error emitir teorías antes de tener datos

Still, it is an error to argue in front of your data. You find yourself insensibly twisting them round to fit your theories.