Quotes About Logic

Among all the liberal arts, the first is logic, and specifically that part of logic which gives initial instruction about words. ... [T]he word "logic" has a broad meaning, and is not restricted exclusively to the science of argumentative reasoning. [It includes] Grammar [which] is "the science of speaking and writing correctly-the starting point of all liberal studies."

I end with a word on the new symbols which I have employed. Most writers on logic strongly object to all symbols. ... I should advise the reader not to make up his mind on this point until he has well weighed two facts which nobody disputes, both separately and in connexion. First, logic is the only science which has made no progress since the revival of letters; secondly, logic is the only science which has produced no growth of symbols.

Logic, n. The art of thinking and reasoning in strict accordance with the limitations and incapacities of the human misunderstanding. The basic of logic is the syllogism, consisting of a major and a minor premise and a conclusion - thus: Major Premise: Sixty men can do a piece of work sixty times as quickly as one man. Minor Premise: One man can dig a post-hole in sixty seconds; Therefore- Conclusion: Sixty men can dig a post-hole in one second. This may be called syllogism arithmetical, in which, by combining logic and mathematics, we obtain a double certainty and are twice blessed.

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.

I enjoy logic and logic puzzles. And filmmaking is one fun logic puzzle that you gotta win.

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 think everyone must love life more than anything else in the world.' 'Love life more than the meaning of it?' 'Yes, certainly. Love it regardless of logic, as you say. Yes, most certainly regardless of logic, for only then will I grasp its meaning. That's what I've been vaguely aware of for a long time. Half your work is done, Ivan: you love life. Now you must try to do the second half and you are saved.

There is no morality by instinct. There is no social salvation in the end without taking thought; without mastery of logic and application of logic to human experience.

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?

Anything outside yourself, this you can see and apply your logic to it. But it's a human trait that when we encounter personal problems, these things most deeply personal are the most difficult to bring out for our logic to scan. We tend to flounder around, blaming everything but the actual, deep-seated thing that's really chewing on us.

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.

Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell.

A God who fits within the confines of our conception is useless. God cannot be comprehended by man's conception or logic. God is an eternal being who transcends the framework of man's limited logic.

Let the Spirit be lacking, and there may be wisdom of words, but not the wisdom of God; the powers of oratory, but not the power of God; the demonstration of argument and the logic of the schools, but not the demonstration of the Holy Spirit, the all-convincing logic of His lightning flash, such as convinced Saul before the Damascus gate. When the Spirit was outpoured the disciples were all filled with power from on high, the most unlettered tongue could silence gainsayers, and with its new fire burn its way through obstacles as flames fanned by mighty winds sweep through forests.

Logic is immaturity weaving its nets of gossamer wherewith it aims to catch the behemoth of knowledge. Logic is a crutch for the cripple, but a burden for the swift of foot and a greater burden still for the wise.

I loved logic, math, computer programming. I loved systems and logic approaches. And so I just figured architecture is this perfect combination.

What sets imperialism of the capitalist sort apart from other conceptions of empire is that it is the capitalist logic that typically dominates, though ... there are times in which the territorial logic comes to the fore. But this then poses a crucial question: how can the territorial logics of power, which tend to be awkwardly fixed in space, respond to the open spatial dynamics of endless capital accumulation? And what does endless capital accumulation imply for the territorial logics of power?

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

All the Dachaus must remain standing. The Dachaus, the Belsens, the Buchenwalds, the Auschwitzes - all of them. They must remain standing because they are a monument to a moment in time when some men decided to turn the Earth into a graveyard. Into it they shoveled all of their reason, their logic, their knowledge,,then we become the gravediggers.

I'm not at my best when I moralize or philosophize. Logic is elusive, especially to one who so rarely uses it.

It is probably true that almost all atheists stand for the values of reason and freethought. I will attempt to put these values in more substantial terms. There is the belief that inquiry and doubt are essential checks against deception, self deception, and error. There is the belief that logic and the scientific method is the only way the world can arrive at an agreement on the truth about anything.

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

People want to ignore what they can't understand. They're looking for logic at any cost.

Feeling insignificant because the universe is large has exactly the same logic as feeling inadequate for not being a cow.

The logic of war seems to be if the belligerent can fight, he will fight. That leaders will not surrender until surrender is academic. How is a national leader to explain the sacrifice of so much for nothing?

For once, you're going to hear something that doesn't fit into your neat, compartmentalized world of order and logic and reason.

I think each family has a funhouse logic all its own, and in that distortion,in that delusion, all behavior can seem both perfectly normal and crazy.

Outside of mathematics and logic, there are common sense truths, such as that it is snowing that normal observers, in a specified context can agree on, subject to vagueness considerations, and theoretical truths, such as that snow is crystallised water vapour, and maybe in-between truths.

You can't win. Logic has no power over her when her territory has been invaded by heathens.

Insanity is often the logic of an accurate mind overtasked.

Atlantis: Fabled. Mystical. Golden. Mysterious. Glorious and magical. There are those who claim that it never was. But then there are also those who think they are safe in this modern world of technology and weapons. Safe from all the ancient evils. They even believe that wizards, warriors, and dragons are long dead. They are fools clinging to their science and logic while thinking it will save them. (Thrylos)

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

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.

Be grateful simply for being alive. When you are grateful for life, pure and simple, your life becomes one you can be grateful for. That may strike you as circular or even backward logic, but your attitude really does have an effect on how things work out. When you can't change your life any other way, you can still change your attitude. When you do, your life changes. You find more chances to love, and you will be surprised to see how much more love is returned to you.

There can never be surprises in logic.

Admit nothing - that was his first rule. Appeal to logic - second rule. Delay the inevitable - third rule.

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.

so my grandmother was not without humanity. and if she wore cocktail dresses when she labored in the garden, they were cocktail dresses she no longer intended to wear to cocktail parties. even in her rose garden she did not want to appear underdressed. if the dresses got too dirty from gardening, she threw them out. when my mother suggested to her that she might have them cleaned, my grandmother said, "what? and have those people at the cleaners what i was doing in a dress to make it that dirty?" from my grandmother i learned that logic is relative.

A skeptic is one who is willing to question any truth claim, asking for clarity in definition, consistency in logic, and adequacy of evidence.

The world of a comic strip ought to be a special place with its own logic and life... I don't want the issue of Hobbes's reality settled by a doll manufacturer.

Oppression has no logic--just a self-fulfilling prophecy, justified by a self-perpetuating system.

What the teacher does is sweep all of the logic, order and reason onto one side and make that side very strong.

Our efforts are not aimed at isolating Israel or de-legitimizing it; rather we want to gain legitimacy for the cause of the people of Palestine. We only aim to de-legitimize the settlement activities and the occupation and apartheid and the logic of ruthless force, and we believe that all the countries of the world stand with us in this regard.

It is perplexing to see the flexibility of the so-called 'exact sciences' which by cast-iron laws of logic and by the infallible help of mathematics can lead to conclusions which are diametrically opposite to one another.

When a person does something, it has the man or woman look about it. It drips with humanity. You can follow the logic of it and see the meaning behind it.

Control of thought is more important for governments that are free and popular than for despotic and military states. The logic is straightforward: a despotic state can control its domestic enemies by force, but as the state loses this weapon, other devices are required to prevent the ignorant masses from interfering with public affairs, which are none of their business… the public are to be observers, not participants, consumers of ideology as well as products.

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