Quotes About Logic

All logic texts are divided into two parts. In the first part, on deductible logic, the fallacies are explained; in the second part, on inductive logic, they are committed.

Grammar and logic free language from being at the mercy of the tone of voice. Grammar protects us against misunderstanding the sound of an uttered name; logic protects us against what we say have double meaning.

I'm not religious, I'm not romantic and I live purely by logic. I make every decision by logic and sometimes that leads me to the right and sometimes to the wrong decision.

Beneath words and logic are emotional connections that largely direct how we use our words and logic.

People knew there were two ways of coming at truth. One was science, or what the Greeks called Logos, reason, logic. And that was essential that the discourse of science or logic related directed to the external world. The other was mythos, what the Greeks called myth, which didn't mean a fantasy story, but it was a narrative associated with ritual and ethical practice but it helped us to address problems for which there were no easy answers, like mortality, cruelty, the sorrow that overtakes us all that's part of the human condition. And these two were not in opposition, we needed both.

It is possible--indeed possible even according to the old conception of logic--to give in advance a description of all 'true' logical propositions. Hence there can never be surprises in logic.

I have said that science is impossible without faith. ... Inductive logic, the logic of Bacon, is rather something on which we can act than something which we can prove, and to act on it is a supreme assertion of faith ... Science is a way of life which can only fluorish when men are free to have faith.

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.

The best magic always results from ecstasies of logic.

With the end of the nominating process, American politics leaves logic behind.

What a silly thing love is!' said the student as he walked away. 'It is not half as useful as logic, for it does not prove anything, and it is always telling one of things that are not going to happen, and making one believe things that are not true. In fact, it is quite unpractical, and, as in this age to be practical is everything, I shall go back to philosophy and study metaphysics.' So he returned to his room and pulled out a great dusty book, and began to read.

There is no learned man but will confess be hath much profited by reading controversies,--his senses awakened, his judgment sharpened, and the truth which he holds firmly established. If then it be profitable for him to read, why should it not at least be tolerable and free for his adversary to write? In logic they teach that contraries laid together, more evidently appear; it follows then, that all controversy being permitted, falsehood will appear more false, and truth the more true; which must needs conduce much to the general confirmation of an implicit truth.

Logic only tells us what's there; it can't really address what isn't. Even the most devoted empiricist must admit that we have no hope of understanding the universe. Some things are unknowable.

Pure logic could never lead us to anything but tautologies; it can create nothing new; not from it alone can any science issue.

Mysteries of attraction could not always be explained through logic. Sometimes the fractures in two separate souls became the very hinges that held them together.

The message I hope to have sent is just the example of being yourself. I tell this to my students: It's not about copying me or my logic systems. It's about allowing yourself to be yourself.

Architecture is involved with the world, but at the same time it has a certain autonomy. This autonomy cannot be explained in terms of traditional logic because the most interesting parts of the work are non-verbal. They operate within the terms of the work, like any art.

And yet when i finally drifted of in that barely conscious state where logic was absent and dreams encroached i could almost hear bone's voice. he was whispering that same promise he'd made to me months ago when our relationship started and i wondered if it was a sign - and if he'd really meant it. If you run from me i'll chase you. And i'll find you.

Any explanation or logic that explains everything so easily has a hidden trap in it. I'm speaking from experience. Somebody once said if it's something a single book can explain, it's not worth having explained. What I mean is don't leap to any conclusions.

Hope is independent of the apparatus of logic.

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

Murder is a horror, but an often necessary horror, never criminal, which it is essential to tolerate in a republican State. Is it or is it not a crime? If it is not, why make laws for its punishment? And if it is, by what barbarous logic do you, to punish it, duplicate it by another crime?

The art of reasoning becomes of first importance. In this line antiquity has left us the finest models for imitation; I should consider the speeches of Livy, Sallust, and Tacitus, as pre-eminent specimens of logic, taste, and that sententious brevity which, using not a word to spare, leaves not a moment for inattention to the hearer. Amplification is the vice of modern oratory.

It's the unlikely juxtaposition of creativity and logic which causes the wooliness and confusion around the term 'innovation'. Everybody wants to be innovative; many companies and ideas are proclaimed to be innovative and no one doubts that innovation is a money spinner. And, thus, we are all looking for the magic formula. Well, here you go: Creativity + Iterative Development = Innovation.

Most mistakes in philosophy and logic occur because the human mind is apt to take the symbol for the reality.

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.

As in political revolutions, so in paradigm choice--there is no standard higher than the assent of the relevant community. To discover how scientific revolutions are effected, we shall therefore have to examine not only the impact of nature and of logic, but also the techniques of persuasive argumentation effective within the quite special groups that constitute the community of scientists.

Women do not think with logic and discretion but with emotions of the heart

Nothing is impossible when we follow our inner guidance, even when its direction may threaten us by reversing our usual logic.

I love the sticky leaves in spring, the blue sky — that’s all it is. It’s not a matter of intellect or logic, it’s loving with one’s inside, with one’s stomach.

The deep paradox uncovered by AI research: the only way to deal efficiently with very complex problems is to move away from pure logic.... Most of the time, reaching the right decision requires little reasoning.... Expert systems are, thus, not about reasoning: they are about knowing.... Reasoning takes time, so we try to do it as seldom as possible. Instead we store the results of our reasoning for later reference.

What Artistic and Scientific Experience Have in Common - Where the world ceases to be the scene of our personal hopes and wishes, where we face it as free beings admiring, asking, and observing, there we enter the realm of Art and Science. If what is seen and experienced is portrayed in the language of logic, we are engaged in science. If it is communicated through forms whose connections are not accessible to the conscious mind but are recognized intuitively as meaninful, then we are engaged in art. Common to both is the loving devotion to that which transcends personal concerns and volition.

Logic and fact keep interfering with the easy flow of conversation.

The fact, and the intuition or logic about the fact, are severe coordinates in fiction. In the short story they must cross with hair-line precision.

When money, instead of man, is at the center of the system, when money becomes an idol, men and women are reduced to simple instruments of a social and economic system, which is characterized, better yet dominated, by profound inequalities. So we discard whatever is not useful to this logic; it is this attitude that discards children and older people, and is now affecting the young.

One of the most ordinary weaknesses of the human intellect is to seek to reconcile contrary principles, and to purchase peace at the expense of logic.

Just between you and me, shouldn’t the World Bank be encouraging MORE migration of the dirty industries to the LDCs [Less Developed Countries]?... I think the economic logic behind dumping a load of toxic waste in the lowest wage country is impeccable and we should face up to that... I’ve always though that under-populated countries in Africa are vastly UNDER-polluted, their air quality is probably vastly inefficiently low compared to Los Angeles or Mexico City.

A critic is a man who creates nothing and thereby feels qualified to judge the work of creative men. There is logic in this; he is unbiased, he hates all creative people equally.

The difference between love and logic is that in the eyes of a lover, a toad can be a prince, whereas in the analysis of a logistician, the lover would have to prove that the toad was a prince, an enterprise destined to dull the shine of many a passion.

You have to play the logic of a character.

In life, particularly in public life, psychology is more powerful than logic.

Any useful logic must concern itself with Ideas with a fringe of vagueness and a Truth that is a matter of degree.

Anything that contradicts experience and logic should be abandoned.

I spent 10 years in professional politics and eight writing comics, and so I look at it from both sides. I don't understand the logic in being frustrated with a system, so you choose to be a part of the reason why the system is so frustrating. If everybody voted, it wouldn't be this way.

In every enterprise ... the mind is always reasoning, and, even when we seem to act without a motive, an instinctive logic still directs the mind. Only we are not aware of it, because we begin by reasoning before we know or say that we are reasoning, just as we begin by speaking before we observe that we are speaking, and just as we begin by seeing and hearing before we know what we see or what we hear.

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

Logic and sermons never convince, The damp of the night drives deeper into my soul.

In laying hands upon the sacred ark of absolute permanency, in treating the forms that had been regarded as types of fixity and perfection as originating and passing away, the Origin of Species introduced a mode of thinking that in the end was bound to transform the logic of knowledge, and hence the treatment of morals, politics, and religion.