Logic Quotes

500+ Sourced quotes

Whereas logic and objectivity are usually the predominant features of a man's outer attitude, or are at least regarded as ideals, in the case of a woman it is feeling. But in the soul it is the other way round: inwardly it is the man who feels, and the woman who reflects. Hence a man's greater liability to total despair, while a woman can always find comfort and hope; accordingly a man is more likely to put an end to himself than a woman. However much a victim of social circumstances a woman may be, as a prostitute for instance, a man is no less a victim of impulses from the unconscious, taking the form of alcoholism and other vices.

Forever I shall be a stranger to myself. In psychology as in logic, there are truths but no truth.

Tout de même, said Poirot, since I cannot find anything, eh bien, then the logic falls out of the window.

Agatha Christie

The rules of logic are to mathematics what those of structure are to architecture.

Bertrand Russell

Briefly, you can only find truth with logic if you have already found truth without it.

G. K. Chesterton

The fact that all Mathematics is Symbolic Logic is one of the greatest discoveries of our age; and when this fact has been established, the remainder of the principles of mathematics consists in the analysis of Symbolic Logic itself.

Bertrand Russell

A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.

Bertrand Russell

Frege has the merit of...finding a third assertion by recognising the world of logic which is neither mental nor physical.

Bertrand Russell

Men are further beholding... generally to chance, or anything else, than to logic, for the invention or arts and sciences.

Impulse is, after all, the best linguist; its logic, if not conformable to Aristotle, cannot fail to be most convincing.

Henry David Thoreau

By abstaining from all definite content, whether as formal logic and theory of science or as the legend of Being beyond all beings, philosophy declared its bankruptcy regarding concrete social goals.

Theodor W. Adorno

You can hire logic, in the shape of a lawyer, to prove anything that you want to prove.

Oliver Wendell Holmes, Sr.

Aristotle can be regarded as the father of logic. But his logic is too scholastic, full of subtleties, and fundamentally has not been of much value to the human understanding. It is a dialectic and an organon for the art of disputation.

It is a mysterious thing, the loss of faith-as mysterious as faith itself. Like faith, it is ultimately not rooted in logic; it is a change in the climate of the mind.

The life of the law has not been logic; it has been experience... The law embodies the story of a nation's development through many centuries, and it cannot be dealt with as if it contained only the axioms and corollaries of a book of mathematics.

Oliver Wendell Holmes, Jr.

A civilization is a heritage of beliefs, customs, and knowledge slowly accumulated in the course of centuries, elements difficult at times to justify by logic, but justifying themselves as paths when they lead somewhere, since they open up for man his inner distance.

Antoine de Saint-Exupéry

Sir, we must beware of needless innovation, especially when guided by logic.

Winston Churchill

This task entrusted to us by God the Creator requires us to grasp the rhythm and logic of creation. But we are often driven by pride of domination, of possessions, manipulation, of exploitation; we do not "care" for it, we do not respect it, we do not consider it as a free gift that we must care for.

"I know what you're thinking about," said Tweedledum; "but it isn't so, nohow." "Contrariwise," continued Tweedledee, "if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."

That Logic has advanced in this sure course, even from the earliest times, is apparent from the fact that, since Aristotle, it has been unable to advance a step, and thus to all appearance has reached its completion.

The seed haunted by the sun never fails to find its way between the stones in the ground. And the pure logician, if no sun draws him forth, remains entangled in his logic.

Antoine de Saint-Exupéry

Modern science cares far less for pure logic than a dancing Dervish.

G. K. Chesterton

Logic is concerned with the real world just as truly as zoology [is].

Bertrand Russell

SIMPLICO: Indeed, I begin to understand that while logic is an excellent guide in discourse, it does not, as regards stimulation to discovery, compare with the power of sharp distinction which belongs to geometry.

Galileo Galilei

Inferences of Science and Common Sense differ from those of deductive logic and mathematics in a very important respect, namely, when the premises are true and the reasoning correct, the conclusion is only probable.

Bertrand Russell