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Logic Quotes

It’s whatever the majority deems it to be. It’s not necessarily the best or the most logical, but it...

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Paulo CoelhoVeronika Decides to Die

It's difficult to know where to begin, sir.''Yes, the beginning is the tricky part. But perhaps ther...

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It is one of the greatest Curses visited upon Mankind, he told me, that they shall fear where no Fea...

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Everybody knows that Aristotelian two-value logic is fucked.

A mind all logic is like a knife all blade. It makes the hand bleed that uses it.

If scientific reasoning were limited to the logical processes of arithmetic, we should not get very ...

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I suppose therefore that all things I see are illusions; I believe that nothing has ever existed of ...

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And thus, the actions of life often not allowing any delay, it is a truth very certain that, when it...

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Yet I must tell you, that all these graces which are expressed by passions of sorrow, fear, joy, hop...

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Consideration doth, as it were, open the door between the head and the heart: the understanding havi...

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Mathematics as an expression of the human mind reflects the active will, the contemplative reason, a...

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Richard CourantWhat Is Mathematics?: An Elementary Approach to Ideas and Methods

His was not a small mind bothered by logic and consistency.

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Robert A. HeinleinStranger in a Strange Land

For millennia philosophers and saints have tried to reason out a logical scheme for the universe... ...

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Robert A. HeinleinThe Cat Who Walks Through Walls

Definitions are the foundation of reason. You can’t reason without them.

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Robert M. PirsigZen and the Art of Motorcycle Maintenance: An Inquiry Into Values

If you can’t define something you have no formal rational way of knowing that it exists. Neither can...

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Robert M. PirsigZen and the Art of Motorcycle Maintenance: An Inquiry Into Values

Now we’ve a real intellectual impasse. Our reason, which is supposed to make things more intelligibl...

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Robert M. PirsigZen and the Art of Motorcycle Maintenance: An Inquiry Into Values

The real purpose of the scientific method is to make sure Nature hasn't misled you into thinking you...

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Robert M. PirsigZen and the Art of Motorcycle Maintenance: An Inquiry Into Values

There is room for words on subjects other than last words.

The self is the class (not the collection) of the experiences (or autopsychological states). The sel...

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Rudolf CarnapThe Logical Structure of the World and Pseudoproblems in Philosophy

Logic is the last scientific ingredient of Philosophy; its extraction leaves behind only a confusion...

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If reason ruled the world would history even exist?

Becoming a part of a movement doesn't help anybody think clearly.

Needless to say, there are people who hate Arabs, Somalis, and other immigrants from predominantly M...

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If someone doesn't value evidence, what evidence are you going to provide to prove that they should ...

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As many critics of religion have pointed out, the notion of a creator poses an immediate problem of ...

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Faith is the mortar that fills the cracks in the evidence and the gaps in the logic, and thus it is ...

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Sam HarrisThe End of Faith: Religion

When a man in a forest thinks he is going forward in a straight line, in reality he is going in a ci...

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Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

Logic is like the sword--those who appeal to it shall perish by it.

I knew from experience that no matter how much you turn things in your head, trying to make sense of...

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Annie clouded up. For a second, he thought she was going to erupt, and flinched. She saw that...and ...

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One can accomplish something only so long as one cannot accomplish everything.

If chess has any relationship to film-making, it would be in the way it helps you develop patience a...

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Logic is neither an art nor a science but a dodge.

Chélan had acted as imprudently for Julien as he had for himself. He had given him the habit of reas...

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StendhalThe Red and the Black

The facts of nature are what they are, but we can only view them through the spectacles of our mind....

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Stephen Jay GouldBully for Brontosaurus: Reflections in Natural History

What do you think science is? There's nothing magical about science. It is simply a systematic way f...

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The goal of argumentation is to make a case so forceful (note the metaphor) that skeptics are coerce...

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Takes more than combat gear to make a man Takes more than a license for a gun Confront your enemies,...

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Captain Vimes believed in logic, in much the same way as a man in a desert believed in ice -- i.e., ...

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Questions don't have to make sense, Vincent," said Miss Susan. "But answers do.

*There is only one God*. Whatever exists is *ipso facto* individual; to be one it needs no extra pro...

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Thomas AquinasSumma Theologiae: A Concise Translation

For every relationship involves two related terms. Sometimes relationships are not real in either te...

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Picture of Thomas Aquinas
Thomas AquinasSumma Theologiae: A Concise Translation

Causes of individuals presuppose causes of the species, which are not univocal yet not wholly equivo...

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Picture of Thomas Aquinas
Thomas AquinasSumma Theologiae: A Concise Translation

In a republican nation, whose citizens are to be led by reason and persuasion and not by force, the ...

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In liberal logic, if life is unfair then the answer is to turn more tax money over to politicians, t...

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We seem to inhabit a universe made up of a small number of elements-particles-bits that swirl in cha...

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Logic only gives man what he needs,” he stammered. “Magic gives him what he wants.

The highest function of love is that it makes the loved one a unique and irreplaceable being.

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Tom RobbinsJitterbug Perfume

There's no point in saving the world if it means losing the moon.

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Tom RobbinsStill Life with Woodpecker

I was upset. I had always believed logic was a universal weapon and now I realized how its validity ...

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Almost everything carried to its logical extreme becomes either depressing or carcinogenic.

The best minds have their soft spots and sometimes feel somewhat bruised by the scant respect of log...

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What does the brain matter compared with the heart?

Logical reasoning may be a most convenient means of mental communication for covering short distance...

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Vladimir NabokovThe Stories of Vladimir Nabokov

A truth that's told with bad intentBeats all the lies you can invent.

I, therefore, for one, cannot see my way to accepting the agnostic rules for truth-seeking, or wilfu...

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All men are mortal. Socrates was mortal. Therefore, all men are Socrates.

What is the purpose of reason, Richard Parker? Is it no more than to shine at practicalities - the g...

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I am like a machine being driven to excessive rotations: the bearings are incandescing and, in a min...

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I'm like a machine being run over its RPM limit. The bearings are overheating: a minute longer and t...

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The only reason I'm writing this down is to show how human reason, even very sharp and exact human r...

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She was a logical child, as far as children go. She did not understand how such a nice, kind, good G...

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When people attempt to rebel against the iron logic of Nature, they come into conflict with the very...

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Everything must be taken into account. If the fact will not fit the theory---let the theory go.

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Agatha ChristieThe Mysterious Affair at Styles

For the artist himself art is not necessarily therapeutic; he is not automatically relieved of his f...

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Al AlvarezThe Savage God: A Study of Suicide

It is always easy to be logical. It is almost impossible to be logical to the bitter end.

There are crimes of passion and crimes of logic. The boundary between them is not clearly defined.

Logic will get you from A to B. Imagination will take you everywhere.

We men of intelligence will learn to harness the insanities of reason. We can't leave the world any ...

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Wherever a choice has had to be made between the man of reason and the madman, the world has unhesit...

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Chess is not only knowledge and logic.

Here is the tragedy of theology in its distilled essence: The employment of high-powered human intel...

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Theologians, and religionists in general, start with a fantasy premise and then proceed to apply rig...

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She plays chess from the passions and I play it from logic and she usually wins. Once, I took her qu...

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Consequently, if you believe God made Satan, you must realize that all Satan's power comes from God ...

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Anne RiceInterview with the Vampire

A singer can shatter glass with the proper high note," he said, "but the simplest way to break glass...

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Anne RiceThe Vampire Lestat

I have often had a retrospective vision where everything in my past life seems to fall with signific...

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It is from their foes, not their friends, that cities learn the lesson of building high walls

For he who lives as passion directs will not hear argument that dissuades him, nor understand it if ...

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The cheese-mites asked how the cheese got there, And warmly debated the matter; The Orthodox said th...

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Now, Watson," said he, "we have picked up two clues this morning. One is the bicycle with the Palmer...

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Arthur Conan DoyleThe Adventure of the Priory School

Before we begin to investigate that, let us try to realize what we do know, so as to make the most o...

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Arthur Conan DoyleThe Adventure of the Solitary Cyclist

When once your point of view is changed, the very thing which was so damning becomes a clue to the t...

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Arthur Conan DoyleThe Case-Book of Sherlock Holmes

We must look for consistency. Where there is a want of it we must suspect deception.

Picture of Arthur Conan Doyle
Arthur Conan DoyleThe Casebook of Sherlock Holmes: Volume 1

Holmes,” I cried, “this is impossible.” “Admirable!” he said. “A most illuminating remark. It IS imp...

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Arthur Conan DoyleThe Complete Sherlock Holmes

There were no footmarks.''Meaning that you saw none?''I assure you, sir, that there were none.''My g...

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Arthur Conan DoyleThe Return of Sherlock Holmes

I assure you, my good Lestrade, that I have an excellent reason for everything that I do.

Picture of Arthur Conan Doyle
Arthur Conan DoyleThe Return of Sherlock Holmes

It is easy to understand that in the dreary middle ages the Aristotelian logic would be very accepta...

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I probably hold the distinction of being one movie star who, by all laws of logic, should never have...

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Logic rests on the axiom that existence exists. Logic is the art of non-contradictory identification...

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I win by means of nothing but logic and I surrender to nothing but logic. I do not surrender my reas...

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I'm an old-fashioned guy. I believe in the Enlightenment, and reason, and logic, and you know, facts...

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There's a wonderful, perhaps apocryphal story that people tell about Daniel Patrick Moynihan, the br...

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Barack ObamaThe Audacity of Hope: Thoughts on Reclaiming the American Dream