Best 923 quotes in «logic quotes» category

It will be seen how there can be the idea of a special science, the *critique of pure reason* as it may be called. For reason is the faculty which supplies the *principles* of *a priori* knowledge. Pure reason therefore is that which contains the principles of knowing something entirely *a priori*. An *organon* of pure reason would be the sum total of the principles by which all pure *a priori* knowledge can be acquired and actually established. Exhaustive application of such an organon would give us a system of pure reason. But as this would be a difficult task, and as at present it is still doubtful whether indeed an expansion of our knowledge is possible here at all, we may regard a science that merely judges pure reason, its sources and limits, as the *propaedeutic* to the system of pure reason. In general, it would have to be called only a *critique*, not a *doctrine* of pure reason. Its utility, in regard to speculation, would only be negative, for it would serve only to purge rather than to expand our reason, and, which after all is a considerable gain, would guard reason against errors. I call all knowledge *transcendental* which deals not so much with objects as with our manner of knowing objects insofar as this manner is to be possible *a priori*. A system of such concepts would be called *transcendental philosophy*. But this is still, as a beginning, too great an undertaking. For since such a science must contain completely both analytic and synthetic *a priori* knowledge, it is, as far as our present purpose is concerned, much too comprehensive. We will be satisfied to carry the analysis only so far as is indispensably necessary in order to understand in their whole range the principles of *a priori* synthesis, with which alone we are concerned. This investigation, which properly speaking should be called only a transcendental critique but not a doctrine, is all we are dealing with at present. It is not meant to expand our knowledge but only to correct it, and to become the touchstone of the value, or lack of value, of all *a priori* knowledge. Such a critique is therefore the preparation, as far as possible, for a new organon, or, if this should turn out not to be possible, for a canon at least, according to which, thereafter, the complete system of a philosophy of pure reason, whether it serve as an expansion or merely as a limitation of its knowledge, may be carried out both analytically and synthetically. That such a system is possible, indeed that it need not be so comprehensive as to cut us off from the hope of completing it, may already be gathered from the fact that it would have to deal not with the nature of things, which is inexhaustible, but with the understanding which makes judgments about the nature of things, and with this understanding again only as far as its *a priori* knowledge is concerned. The supply of this *a priori* knowledge cannot be hidden from us, as we need not look for it outside the understanding, and we may suppose this supply to prove sufficiently small for us to record completely, judge as to its value or lack of value and appraise correctly. Still less ought we to expect here a critique of books and systems of pure reason, but only the critique of the faculty of pure reason itself. Only once we are in possession of this critique do we have a reliable touchstone for estimating the philosophical value of old and new works on this subject. Otherwise, an unqualified historian and judge does nothing but pass judgments upon the groundless assertions of others by means of his own, which are equally groundless.

I was upset. I had always believed logic was a universal weapon and now I realized how its validity depended on the way it was employed.

We couldn't trust them. They couldn't trust us. Mutual attempts at destruction are the only logical result. He thought of human dreams - both Old Empire and new - of contacting some extra-terrestrial intelligence such as nobody had ever truly encountered. Why? Why would we ever want to? We'd never be able to communicate, and even if we could, we'd still be those same two prisoners forced to trust - and risk - or to damn the other in trying to save slightly more of our own hides.

I went out into the corridor. I asked a nurse if she knew where the people with arthritis went. She said lots of them went to Ward 34 on the top floor. She said she thought that was a silly place to put people with bad bones who had such trouble walking and climbing stairs.

I will no longer argue with the senseless and unreasonable; for they are void of reason and common sense.

I win by means of nothing but logic and I surrender to nothing but logic. I do not surrender my reason or deal with men who surrender theirs.

Listen to that inner voice of yours. It's not you, but it's for you.

Logical but not reasonable. Wasn't that the definition of a robot?

Logically, I understand that it wasn't Edward's fault my family fell apart after he left. But when you're eleven years old, you don't give a flip about logic. You just really miss holding your big brother's hand.

Logic is not a sure enough defense against moral bankruptcy.

Logic, it is often said, is the study of valid arguments. It is a systematic attempt to distinguish valid arguments from invalid arguments.

Logic may be conceived as ruling out what is absolutely impossible, and thus determining the field of what in the absence of empirical knowledge is abstractly possible.

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

Long before there was any science there was commons sense first.

Logic, if used as the main instrument for thinking, frustrates the functions of the mind – it doesn‘t improve them. Great ideas are often the result of creativity, serendipity and higher pleasures. A logical thought experiment may be thus successful only if it is infused with the aforementioned three elements.

Logically, this kind of atheism did not prove that there was no God.... On the contrary, Southwell was typical in placing the onus probandi on those who affirmed the existence of God and Holyoake regarded himself as an atheist only in his inability to believe what the churches would have him believe. They were content to show that the Christian concept of the supernatural was meaningless, that the arguments in its favor were illogical, and that the mysteries of the universe, insofar as they were explicable, could be accounted for in material terms.

Logic has been place upon us to keep our minds controlled by rules and limitations.

Logic is always defeated by itself, that is to say, by the insignificance of the cases on which it thrives.’ Ibid-25 bit.ly/Mnhoc7

Logic stays true, wherever you may go, So logic never tells you where you live.

Logic and reason are the naphthalene balls we use to pack them away into a sandook called 'Someday'. But when that day comes we are too old, too poor, too tired or too lazy.

Logic has rid us of the absurdity of our clothes. That’s progress, no irony, only now we are cold. Hale and ill trade bodies with unusual willingness, while in midair souls tangle. The young start out disgusted and Poetry is left to the memo-writers.

Logic is a mere iceberg in the Mediterranean of wisdom.

Logic is the art of non-contradictory identification. A contradiction cannot exist. No concept man forms is valid unless he integrates it without contradiction into the total sum of his knowledge. To arrive at a contradiction is to confess an error in one’s thinking; to maintain a contradiction is to abdicate one’s mind and to evict oneself from the realm of reality

Logic may indeed be unshakeable, but it cannot withstand a man who is determined to live. Where was the judge he had never seen? Where was the High Court he had never reached? He raised his hands and spread out all his fingers. But the hands of one of the men closed round his throat, just as the other drove the knife deep into his heart and turned it twice.

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

Look up, always. Look back, never.

Look,’ said Tyrena. ‘In twentieth-century Old Earth, a fast food chain took dead cow meat, fried it in grease, added carcinogens, wrapped it in petroleum-based foam, and sold nine hundred billion units. Human beings. Go figure.

Logical reasoning may be a most convenient means of mental communication for covering short distances, but the curvature of the earth, alas, is reflected even in logic: an ideally rational progression of thought will finally bring you back to the point of departure where you return aware of the simplicity of genius, with a delightful sensation that you have embraced truth, while actually you have merely embraced your own self... anything you might term a deduction already exposes the flaw: logical development inexorably becomes an envelopment.

Logic can't explain the salmon swimming upstream. So it denies the existence of salmon.

Logic is an organized way to go wrong with confidence. We should all know by now that a logical course is not always the right one.

Logic is the kingdom of the unexpected. To think logically is to be perpetually astonished.

Logic is the science of the justification of conclusions we have reached by natural reasoning. My point is that, for such natural reasoning to occur, consciousness is not necessary. The very reason we need logic at all is because most reasoning is not conscious at all.

Logic kills. Faith burns. Better to be the one with the torch than the one on the pyre.

Lógico es todo lo que se entiende aunque no sea verdad.

Logic stems from the mind of man, therefore it's limited, it's flawed. Faith gives you hope, keeps you from despair. Faith is what picks you up and ensures you keep going. Logic keeps you lying facedown in the muck at your feet.

Logic will get you from point A to point B. Imagination and hard work will take you everywhere else.

Logic in all its infinite potential, is the most dangerous of vices. For one can always find some form of logic to justify his action, and rest comfortably in the assurance, that what he did abides by reason. That is why, for us brittle beings, Intention is the only true weapon of peace.

Logic is a cruel tool to use for the mending of hearts.

Logic will save you when nothing else will.

Magic was merely the unknown, a wild thing undefined by logic or reason.

Love may be a ring that has no end, but the logic is far from circular.

Majina ya vitabu yanapaswa kuchaguliwa kwa mantiki na kwa makini ya hali ya juu mno, kwa sababu ni miongoni mwa vitu vya kwanza watu wanavyoviona na kuvisoma. Watu wakivutiwa na jina la kitabu, au mwandishi; kitu cha pili watakachovutiwa kuangalia ni dibaji, kusudi wasome muhtasari wa kitabu kizima. Kwa hiyo dibaji inapaswa iandikwe kwa mantiki na kwa makini ileile iliyotumika katika kuchagua jina la kitabu. Lengo la jina la kitabu na dibaji ni kuishawishi hadhira kusoma kitabu na kukifurahia.

Man is but lost in wishes, Of wealth, fame and riches, This airy castle he stitches, With logic that are his ditches.

Marcuse's own highhanded scorn about those whom he criticizes makes it not inapposite to remark that the arguments which I have been deploying are very elementary ones, familiar to every student with the barest knowledge of logic. The suspicion is thus engendered that not only Marcuse but also Adorno and Horkheimer actually do not know any logic, and it is certainly the case that, if they do know any, all three have taken some pains to conceal their knowledge of the subject which they are professedly criticizing.

Many people have said to me that I’m a mystic. I find that a bit mysterious. I just use logic and common sense for my philosophies.

Most plans are critically flawed by their own logic. A failure at any step will ruin everything. That's just basic cause and effect. It's easy for a good plan to fall apart. Therefore, a plan that has no attachment to logic cannot be stopped. The success or failure of any step will have no impact on the macro level.

Mathematical design is the future. Landscape Mathematics is the revolution!

Mathematics had never had more than a secondary interest for him [her husband, George Boole]; 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 give rest had no tendency to prove them.

May the Furies tear out my tongue if I ever argue philosophy again.

Mental health sufferers are not crazy. They have special insight. You better recognize that setting aside your interest people to stay asleep and show empathy towards God's imperfect creations, otherwise the world has no meaning to exist.