Best 923 quotes in «logic quotes» category

There was no arguing with a man when he started saying thing like that -- using logic as a weapon.

There were no footmarks.' 'Meaning that you saw none?' 'I assure you, sir, that there were none.' 'My good Hopkins, I have investigated many crimes, but I have never yet seen one which was committed by a flying creature. As long as the criminal remains upon two legs so long must there be some indentation, some abrasion, some trifling displacement which can be detected by the scientific searcher.

The right thing was confusing, and difficult, and sometimes Jason wondered if it was in fact a nonexistent ideal, like heaven or the American dream. There was no right thing. You did what you did for whatever reasons occurred to you at the time, depending on whichever emotion was running thickest in your blood. Your desire and fear and adrenaline and longing. You made your choice and came up with the reasons later.

The sensible man,' Crow had said (to Sherlock Holmes), 'don't look to confirm what he already knows -- he looks to deny it. Finding evidence that backs up your theories ain't useful, but finding evidence that your theories are wrong is priceless. Never try to prove yourself right -- always try to prove yourself wrong instead.

The sincerity of Darwin really admitted this; and that is how we came to use such a term as the Missing Link. But the dogmatism of Darwinians has been too strong for the agnosticism of Darwin; and men have insensibly fallen into turning this entirely negative term into a positive image. They talk of searching for the habits and habitat of the Missing Link; as if one were to talk of being on friendly terms with the gap in a narrative or the hole in an argument, of taking a walk with a non-sequitur or dining with an undistributed middle.

The spaces that humans allow to contain them have their own history - albeit a history that has never been told, and whose heroes are eo ipso not humans themselves, but rather the topoi and spheres as whose function humans flourish, and from which they fall if their unfolding fails.

The study of Scripture I find to be quite like mastering an instrument. No one is so good that they cannot get any better; no one knows so much that they can know no more. A professional can spot an amateur or a lack of practice or experience a mile away. His technicality, his spiritual ear is razor-sharp. He is familiar with the common mistakes, the counter-arguments; and insofar as this, he can clearly distinguish the difference between honest critics of the Faith and mere fools who criticize that which they know nothing.

The superior weapon of choice to fight ineffective, unwarranted distrust and fear, is a commitment to believing in others, coupled with a charitable heart; it is then that logic and intellect can be most successfully employed to deal with such negative emotions.

[T]he success of democracy depends, in the end, on the reliability of the judgments we citizens make, and hence upon our capacity and determination to weigh arguments and evidence rationally.

The television commercial has mounted the most serious assault on capitalist ideology since the publication of Das Kapital. To understand why, we must remind ourselves that capitalism, like science and liberal democracy, was an outgrowth of the Enlightenment. Its principal theorists, even its most prosperous practitioners, believed capitalism to be based on the idea that both buyer and seller are sufficiently mature, well informed and reasonable to engage in transactions of mutual self-interest. If greed was taken to be the fuel of the capitalist engine, the surely rationality was the driver. The theory states, in part, that competition in the marketplace requires that the buyer not only knows what is good for him but also what is good. If the seller produces nothing of value, as determined by a rational marketplace, then he loses out. It is the assumption of rationality among buyers that spurs competitors to become winners, and winners to keep on winning. Where it is assumed that a buyer is unable to make rational decisions, laws are passed to invalidate transactions, as, for example, those which prohibit children from making contracts...Of course, the practice of capitalism has its contradictions...But television commercials make hash of it...By substituting images for claims, the pictorial commercial made emotional appeal, not tests of truth, the basis of consumer decisions. The distance between rationality and advertising is now so wide that it is difficult to remember that there once existed a connection between them. Today, on television commercials, propositions are as scarce as unattractive people. The truth or falsity of an advertiser's claim is simply not an issue. A McDonald's commercial, for example, is not a series of testable, logically ordered assertions. It is a drama--a mythology, if you will--of handsome people selling, buying and eating hamburgers, and being driven to near ecstasy by their good fortune. No claim are made, except those the viewer projects onto or infers from the drama. One can like or dislike a television commercial, of course. But one cannot refute it.

The third preliminary problem for every theory of reality is that of the experience of transcendence. We saw in the case of Berkeley that his erroneous principle *percipi est esse*, and his assertion that any being which we think, just for the reason that it is thought, cannot at the same time be regarded as subsisting independently of thinking, incorporate a failure to recognize the consciousness of transcendence peculiar to all intentional acts. This is an instance of the failure to recognize that not only all thinking in the narrower sense, in the sense of grasping an object on the basis of “meanings” and grasping a state of affairs through judgments, but *every* intention in general, whether perception, representation, remembering, the feeling of value, or the posing of ends and goals, points beyond the act and the contents of the act and intends something other than the act [*ein Aktfremdes*], even when what is thought is in turn itself a thought. Indeed, *intentio* signifies a goal-directed movement toward something which one does not have oneself or has only partially and incompletely. Berkeley (following Locke, who was the first to make the basic philosophical error which introduced “psychologism” into epistemology) arrived at the principle *esse est percipi* by making the idea [*Vorstellung*] (and even the sensation) into a thing, an immaterial substance, and by failing to distinguish between the act, the content of an act, and the object. Furthermore, Berkeley confused the being of objects with the fact of being-an-object, even though the latter has only a loose and variable connection with the former. On the other hand, the transcendence of the intentional object with respect to both the *intentio* and its present content is common to every instance of being-an-object. It is, for instance, proper to objects of pure mathematics which are certainly not real but ideal (for example, the number 3). These are produced from the *a priori* material of intuition in accordance with an operational law governing the steps of our thought or intuition. Transcendence is further proper to all fictitious objects and even to contradictory objects, for instance, a square circle. All these sorts of objects, e.g., the golden mountain or Little Red Riding Hood, satisfy the basic principle of the transcendence of objects over and above that aspect of them which is, at any moment, given in consciousness, just as much as do real objects existing independently of all consciousness and knowledge." ―from_Idealism and Realism_

The vanity of intelligence is that the intelligent man is often more committed to 'one-upping' his opponent than being truthful. When the idea of intelligence, rather than intelligence itself, becomes a staple, there is no wisdom in it.

The widest cause of secularization may be the steady change of thinking so that there is the expectation that reason and a consideration of cause and effect will help with explanations. Supernatural power began to be removed from explanations of the process of life or society in the seventeenth century, and although there may be a nod towards astrology or the crossed finger today, superstition is not seriously used in decision making. ... Scientific thinking, which similarly developed in the seventeenth century, has been influential in bringing this change. We now see that tornadoes and earthquakes have rational explanations in terms of climatology and seismology rather than as divine punishments. Most people when deciding whether to take a new job, embark on a divorce, or simply plan a holiday will not seek divine guidance, but rather discuss with themselves or others the issues of cause and effect.

The way most people use their minds is analogous to an ambulance that is used only as an umbrella.

The world is full of people who will help you manufacture tornados in order to blow out a match.

The word 'proof' should strictly only be used when we are dealing with deductive inferences.... Popper claimed that scientists only need to use deductive inferences.... So if a scientist is only interested in demonstrating that a given theory is false, she may be able to accomplish her goal without the use of inductive inferences.... When a scientist collects experimental data, her aim might be to show that a particular theory...is false. She will have to resort to inductive reasoning.... So Popper's attempt to show that science can get by without induction does not succeed.

The world of being is unchangeable, rigid, exact, delightful to the mathematician, the logician, the builder of metaphysical systems, and all who love perfection more than life. The world of existence is fleeting, vague, without sharp boundaries, without any clear plan or arrangement, but it contains all thoughts and feelings, all the data of sense, and all physical objects, everything that can do either good or harm, everything that makes any difference to the value of life and the world. According to our temperaments, we shall prefer the contemplation of the one or of the other.

The wrong approaches to faith and to skepticism are equally detrimental to the path. For the former declares its answers too soon and is later found false; the latter rejects sound answers altogether and hashes itself useless.

The worst thing about logic - it is not democratic. Logic wears an autocratic mask. No compromises are made there for things are binary. Only intellectual standards democratise it to make it human. That is why you joined rationality with character. Rationality is autocratic - what is wrong does not live for long. Wrong facts, theories, and conclusions die - useless to apply in spite of their unlimited supply.

They thought more before nine a.m. than most people thought all month. I remember once declining cherry pie at dinner, and Rand cocked his head and said, 'Ahh! Iconoclast. Disdains the easy, symbolic patriotism.' And when I tried to laugh it off and said, well, I didn't like cherry cobbler either, Marybeth touched Rand's arm: 'Because of the divorce. All those comfort foods, the desserts a family eats together, those are just bad memories for Nick.' It was silly but incredibly sweet, these people spending so much energy trying to figure me out. The answer: I don't like cherries.

Things which are seemingly opposed may in fact be working together

Think about it. When you die you'll be surrounded bu the people you killed. Who the hells goes around killing people they like? In the Afterdeath we'll be surrounded by our enemies.

This does not mean that the one presenting the hypothesis should be resolute to disbelieve his or her postulate but rather the person should be resolute to leave the expressed opinion should they be thoroughly convinced of its lack of accuracy and poignant truth. Whether this truth is made through poetic license and artistic dramatic presentation or through clinical analysis of facts or both, the truth must be embraced not merely denied by blind faith of either new atheism or religious ideals. New or old is of no consequence, only truth and compassion are of value.

This meaning-argument is of a very different kind from the arguments I have been speaking about so far. The premise entails the conclusion all right, but it is so astoundingly false that it defies criticism, at first, by the simple method of taking the reader's breath away. This was a method which the neo-Hegelian idealists later perfected: reasoning from a sudden and violent solecism. Say or imply, for example, that in English “value” means the same as “individuality.” You can be miles down the track of your argument before they get their breath back. This method is not only physiologically but ethologically sound. Of course it should never be used first. You need first to earn the respect of your readers, by some good reasoning, penetrating observations, or the like: then apply the violent solecism. Tell them, for example, that when we say of something that it is a prime number, we mean that it was born out of wedlock. You cannot go wrong this way. Decent philosophers will be so disconcerted by this, that they will never do the one thing they should do: simply say, “That is NOT what ‘prime number’ means!” Instead, they will always begin … [by] casting about for an excuse for someone’s saying what you said, or a half-excuse, or a one-eighth excuse; nor is there any danger that they will search in vain.

This isn't a reasoned response to a configuration of stars, but the heart cannot flourish on logic alone. Unreason is an essential medicine as long as you don't overdose

This may seem labouring the obvious, but in Japan one meets intelligent people who claim that ‘logic’ is something invented in the West to allow Westerners to win discussions. Indeed, the belief is widespread that the Japanese can as happily do without logic now as they supposedly have for centuries past.

Though argument does not create conviction, the lack of it destroys belief.

Those who defy logic and reason slip only into disreality.

Thoughts are nothing but cause and effect.

[T]hough in all practical matters it is indispensable, either always or mostly, to follow custom, to do what is generally done, in theoretical matters it is simply untrue. In practical matters there is a right of the first occupant: what is established must be respected. In theoretical matters this cannot be. Differently stated: The rule of practice is 'let sleeping dogs lie,' do not disturb the established. In theoretical matters the rule is 'do not let sleeping dogs lie.' Therefore, we cannot defer to precedent . . . .

To rely solely on logic is in essence to operate within a structure of limited knowledge and understanding

To Americans, either/or means both.

To be completely objective we must say: All men are mortal. Lionel Samaratunga's son is a man. Therefore Lionel Samaratunga's son is mortal. So stated, it is quite generally true, and is the concern of no-one in particular. It is so generally true that it would serve in a textbook of logic as an example of a syllogism in Barbara (though usually, instead of Lionel Samaratunga's son, it is Socrates whose mortality is logically demonstrated). But how many students of logic are going to shed tears when they read that Lionel Samaratunga's son is destined to die? How many have so much as heard of Lionel Samaratunga, let alone of his son? (And anyway, how many students of logic shed a tear even over the death of Socrates, of whom they may perhaps have heard?) But if you were to come across this syllogism unexpectedly, it is not impossible that you might feel emotionally moved (as perhaps at this very moment you may be feeling a little uncomfortable at my having chosen an example so near home). And why should this be so? Because you are fond of Lionel Samaratunga's son and cannot regard this syllogism in Barbara, which speaks of his mortality, quite so objectively as a student of logic. In other words, as soon as feeling comes in at the door objectivity flies out the window. Feeling, being private and not public, is subjective and not objective. And the Buddha has said (A. III,61: i,176) that it is 'to one who feels' that he teaches the Four Noble Truths. So, then, the Dhamma must essentially refer to a subjective aniccatā—i.e. one that entails dukkha—and not, in any fundamental sense, to an objective aniccatā, which we can leave to students of logic and their professors. (Feeling is not a logical category at all.)

To love me every answer has to be logical.

To leave a man's ego bigger, retweet him. To leave his faculty of reasoning better, challenge his tweet.

To want to tackle everything rationally is irrational.

Truth as a logic structure is closer to simple and the further away from simple you get, the deeper and more nuanced an explanation will become until you reach a point where the energy is so high that no explanation is possible.

Try not to force your idea on someone, but rather think about it with him. If you feel you have won the discussion, that is the wrong attitude. Try not to win the argument; just listen to it.

Truth is on the side of compassion.

Turing attended Wittgenstein's lectures on the philosophy of mathematics in Cambridge in 1939 and disagreed strongly with a line of argument that Wittgenstein was pursuing which wanted to allow contradictions to exist in mathematical systems. Wittgenstein argues that he can see why people don't like contradictions outside of mathematics but cannot see what harm they do inside mathematics. Turing is exasperated and points out that such contradictions inside mathematics will lead to disasters outside mathematics: bridges will fall down. Only if there are no applications will the consequences of contradictions be innocuous. Turing eventually gave up attending these lectures. His despair is understandable. The inclusion of just one contradiction (like 0 = 1) in an axiomatic system allows any statement about the objects in the system to be proved true (and also proved false). When Bertrand Russel pointed this out in a lecture he was once challenged by a heckler demanding that he show how the questioner could be proved to be the Pope if 2 + 2 = 5. Russel replied immediately that 'if twice 2 is 5, then 4 is 5, subtract 3; then 1 = 2. But you and the Pope are 2; therefore you and the Pope are 1'! A contradictory statement is the ultimate Trojan horse.

Ultimate meaning is meaningless. Meaning meaning means everything else.

Two wrongs' create an additional problem. 'A wrong' plus 'A right' creates a remorse. 'Two rights' create a solution.

We are so logic-driven that we can't stand the absence of it.

Using the scientific knowledge that we currently possess, we can take simple logical steps, backed by the strongest evidence that we have, to come to the best and most reasonable conclusion that God is the cause of everything - all without ever taking even a single step of blind faith.

Unreasonable friendship is friendship that defies reason or logic.

Until you can understand illogicality, and the meaningfulness of it, shun the Sufis except for limited, precise, self-evident services.

We are fed ideas in small sound bites that are really just the conclusions of particular beliefs. We do not examine what underpins these sound bites. If the sound bites are presented by a source we are accustomed to accepting as true, there is a danger we will assimilate the conclusion without knowing, or caring, whether it is based on solid arguments and assumptions.

We are raised in a society where we are taught to believe a more logical reason for an illogical happening rather than the illogical reason for something which may be of the unknown, hence, why the logical answer is illogical to the logical person.

We can be the very first generation which fails to see the logic or pride in defining ourselves by anything else but what is found within ourselves: our values

We men of intelligence will learn to harness the insanities of reason. We can't leave the world any longer to the direction of chance. We can't allow dangerous maniacs like Luther, mad about dogma, like Napoleon, mad about himself, to go on casually appearing and turning everything upside down. In the past it didn't so much matter; but our modern machine is too delicate. A few more knocks like the Great War, another Luther or two, and the whole concern will go to pieces. In future, the men of reason must see that the madness of the world's maniacs is canalised into proper channels, is made to do useful work, like a mountain torrent driving a dynamo...