Quotes About Logic

Logic is a wonderful invention. It is so wonderful, people often mistake it for reason. Reason, however, requires sense. Logic requires only consistency.

Water is two parts hydrogen and one part oxygen. What if someone says, “Well, that’s not how I choose to think about water.”? All we can do is appeal to scientific values. And if he doesn’t share those values, the conversation is over. If someone doesn’t value evidence, what evidence are you going to provide to prove they should value it? If someone doesn’t value logic, what logical argument could you provide to show the importance of logic?

But with man the case is otherwise, in that when logic leads to any humiliating conclusion, the sole effect is to discredit logic.

Eventually, Aristotle appeared among the Greeks. He improved the methods of logic and systematized its problems and details. He assigned to logic its proper place as the first philosophical discipline and the introduction to philosophy. Therefore he is called the First Teacher.

Since my logic aims to teach and instruct the understanding, not that it may with the slender tendrils of the mind snatch at and lay hold of abstract notions (as the common logic does), but that it may in very truth dissect nature, and discover the virtues and actions of bodies, with their laws as determined in matter; so that this science flows not merely from the nature of the mind, but also from the nature of things.

Nothing is text but what is spoken of in the Bible and meant there for person and place; the rest is application; which a discreet man may do well; but it is his scripture, not the Holy Ghost's. First, in your sermons use your logic, and then your rhetoric; rhetoric without logic is like a tree with leaves and blossoms, but no root.

Logic ridicules love, and love smiles knowingly at the whole foolishness of logic.

If one doesn't value logic, what logical argument would you invoke to prove they should value logic?

Logic is justly considered the basis of all other sciences, even if only for the reason that in every argument we employ concepts taken from the field of logic, and that ever correct inference proceeds in accordance with its laws.

Life is not logic, life is not philosophy. Life is a dance, a song, a celebration! It is more like love and less like logic.

The principles of logic and mathematics are true simply because we never allow them to be anything else. And the reason for this is that we cannot abandon them without contradicting ourselves, without sinning against the rules which govern the use of language, and so making our utterances self-stultifying. In other words, the truths of logic and mathematics are analytic propositions or tautologies.

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 of the analysis of Symbolic Logic itself.

I am like a machine being driven to excessive rotations: the bearings are incandescing and, in a minute, melted metal will begin to drip and everything will turn to nothing. Quick: get cold water, logic. I am pouring it over myself by the bucketload but the logic sizzles on the hot bearings and dissipates elusive white steam into the air.

Poets do not go mad; but chess-players do. Mathematicians go mad, and cashiers; but creative artists very seldom. I am not, as will be seen, in any sense attacking logic: I only say that this danger does lie in logic, not in imagination.

In Iran's future Islamic system everyone can express their opinion, and the Islamic government will respond to logic with logic.

Your Saying "God is Most Great" does not mean that He is greater than something else, since there is nothing else alongside of Him, so that it could be said that He is greater than it. Rather, the meaning of Allahu Akbar is that He is much too great to be perceived by the senses or for the depths of His Majesty to be reached by reason and logic, and indeed, that He is much too great to be known by an other-than-Him for truly, no one knows God but God.

Logic is the technique by which we add conviction to truth.

what a writer does is to try to make sense of life. I think that's what writing is, I think that's what painting is. It's seeking that thread of order and logic in the disorder, and the incredible waste and marvelous profligate character of life. What all artists are trying to do is to make sense of life.

General scepticism is the live mental attitude of refusing to conclude. It is a permanent torpor of the will, renewing itself in detail towards each successive thesis that offers, and you can no more kill it off by logic than you can kill off obstinacy or practical joking.

If there are more than two sexes, then so be it and, of course, the assumption that there are two helps shape, as many have argued, the binary logic that underpins much of the history of western philosophy.

Let no one rule your mind or body. Take special care that your thoughts remain unfettered... Give men your ear, but not your heart. Show respect for those in power, but don't follow them blindly. Judge with logic and reason, but comment not. Consider none your superior in life. Treat all fairly or they will seek revenge. Be careful with your money. Hold fast to your beliefs and others will listen.

I'm pure geek, pure logic.

I approach my life with logic. I do not act on impulse or emotion. I very seldom find that I say, 'And then I can't think what came over me, but I did this or that or the other.' I nearly always know how I will act and I nearly always act in that way. I don't catch myself out in embarrassing situations because I've acted without forethought. I calculate what I will do.

We didn't want to live anymore in the old logic. And I like that. The consequence of that is to create the dream of that, but we all know this dream may be not possible. So here we have the key of the ambiguity of the atmosphere of my films. Is it possible, this dream? Is it as funny as it seems, or is it tragic?

It seemed to me that this world has a serious shortage of both logic and kindness.

Every song has a composer, every book has an author, every car has a maker, every painting has a painter, and every building has a builder. So it isn't irrational to take this simple logic a little further and say that nature must have had a Maker. It would be irrational to believe that it made itself.

There can never be surprises in logic.

I am all for love, because love fails. You will be surprised - I have my own logic. I am all for love, because love fails. I am not for marriage, because marriage succeeds; it gives you a permanent settlement. And that is the danger: you become satisfied with a toy, you become satisfied with something plastic, artificial, man-made.

When dealing with people, remember you are not dealing with creatures of logic, but creatures of emotion.

I care not for the theoretical symmetry and impregnable logic of your moral code, I care not for the hoary respectability and traditional mysticisms of your theological institutions, I care not for the beauty and solemnity of your rituals and religious ceremonies, I care not even for the reasonableness and unimpeachable fairness of your social ethics,--if it does not turn out better, nobler, truer, men and women,--if it does not add to the world's stock of valuable souls,--if it does not give us a sounder, healthier, more reliable product from this great factory of men--I will have none of it.

Deep in the human unconscious is a pervasive need for a logical universe that makes sense. But the real universe is always one step beyond logic.

You need a long hard day's work to reveal the logic of the craving for very bad tv and alcohol.

In deep pain, people don't need logic, advice, encouragement, or even Scripture. They just need you to show up and shut up.

The devil has a Ph.D. in perfect logic.

The only rule was that the stuff had to be funny and pretty short. To me, the quintessential Army Man joke was one of John Swartzwelder's: 'They can kill the Kennedys. Why can't they make a cup of coffee that tastes good?' It's a horrifying idea juxtaposed with something really banal-and yet there's a kind of logic to it. It's illuminating because it's kind of how Americans see things: Life's a big jumble, but somehow it leads to something I can consume. I love that.

Language is a form of human reason, which has its internal logic of which man knows nothing.

School was more than academics; an education prepared you for the humdrum of real life: working with others, tempering one's personality to assimilate with the group but without losing your individual identity, understading the factors of logic, reasoning, and debate. For a person - vampire or human - to succeed in the world, unlocking the mysteries of the universe was insufficient. One would also need to grasp the mysteries of human nature.

Be brief on the logic and reason portion of your presentation. There are probably about a thousand facts about an automobile, but you don't need them all to make a decision. About a half dozen will do.

Managers who assume that higher profits drive better working conditions may have their logic backwards. Contrary to conventional wisdom, our research identified companies in virtually every industry that are profitable because they provide good jobs.

The much vaunted male logic isn't logical, because they display prejudices against half the human race that are considered prejudices according to any dictionary definition.

At the heart of all sales and marketing is the ability to create demand even in the absence of logic.

Think about how you will start and where you will go. Get the head with logic and the heart with visuals or stories. And think about your core customer and all the other stakeholders as well.

Mathematics had never had more than a secondary interest for him ; and even logic he cared for chiefly as a means of clearing the ground of doctrines imagined to be proved, by showing that the evidence on which they were supposed to rest had no tendency to prove them. But he had been endeavouring to give a more active and positive help than this to the cause of what he deemed pure religion.

When you are faced with prejudice, logic and justice are impotent. Still, we may have an obligation to argue directly into the face of the prejudice, even though there is no chance to win.

Good design is a matter of discipline. It starts by looking at the problem and collecting all the available information about it. If you understand the problem, you have the solution. It’s really more about logic than imagination.

Logic doesn't apply to the real world. D. R. Hofstadter and D. C. Dennett (eds.) The Mind's I, 1981.

Logic is the art of convincing us some truth.

As the great naturalist Charles Darwin saw clearly, individual and collective interests often coincide, as in the invisible hand narrative. But he also saw that in many other cases, interests at the two levels are squarely in conflict, and that in those cases, individual interests generally trump. That simple observation suggests that market failure is often the result not of insufficient competition (the traditional charge from social critics on the Left), but of the very logic of competition itself.