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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.
Augustus De MorganLogic, 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.
Ambrose BierceIt is difficult to remove by logic an idea not placed there by logic in the first place. By nature, we are emotional creatures. Often we live and react based on feelings, not logic. Feelings are wonderful, but when we become tied to a particular thought or belief we tend to ignore the fact that change might be necessary.
Gordon LivingstonIt was all very well going on about pure logic and how the universe was ruled by logic and the harmony of numbers, but the plain fact of the matter was that the Disc was manifestly traversing space on the back of a giant turtle and the gods had a habit of going round to atheists' houses and smashing their windows.
Terry PratchettLove is not the absence of logic but logic examined and recalculated heated and curved to fit inside the contours of the heart.
Tammara WebberI'm not belittling the art world. Not at all. I take it quite seriously, actually. But the logic of art is a vanguard logic that pressures art to incorporate the quotient of risk.
Rachel KushnerSo,โ Marasi said, โyou traded a dead manโs scarf for another dead manโs gun. Butโฆthe gun itself belonged to someone dead, so by the same logicโโ โDonโt try,โ Waxillium said. โLogic doesnโt work on Wayne.โ โI bought a ward against it off a traveling fortune-teller,โ Wayne explained. โIt lets me add two โnโ two and get a pickle.
Brandon SandersonWater is two parts hydrogen and one part oxygen. What if someone says, โWell, thatโs not how I choose to think about water.โ? All we can do is appeal to scientific values. And if he doesnโt share those values, the conversation is over. If someone doesnโt value evidence, what evidence are you going to provide to prove they should value it? If someone doesnโt value logic, what logical argument could you provide to show the importance of logic?
Sam HarrisReligion is an important institution. A nation without religion cannot survive. Yet it is also very important to note that religion is a link between Allah and the individual believer. The brokerage of the pious cannot be permitted. Those who use religion for their own benefit are detestable. We are against such a situation and will not allow it. Those who use religion in such a manner have fooled our people; it is against just such people that we have fought and will continue to fight. Know that whatever conforms to reason, logic, and the advantages and needs of our people conforms equally to Islam. If our religion did not conform to reason and logic, it would not be the perfect religion, the final religion.
Mustafa Kemal AtaturkBut with man the case is otherwise, in that when logic leads to any humiliating conclusion, the sole effect is to discredit logic.
James Branch CabellWhat do you think science is? There is nothing magical about science. It is simply a systematic way for carefully and thoroughly observing nature and using consistent logic to evaluate results. So which part of that exactly do you disagree with? Do you disagree with being thorough? Using careful observation? Being systematic? Or using consistent logic?
Steven NovellaBeneath words and logic are emotional connections that largely direct how we use our words and logic.
Jane RobertsThe nineteenth century was completely lacking in logic, it had cosmic terms and hopes, and aspirations, and discoveries, and ideals but it had no logic.
Gertrude SteinPeople 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.
Karen ArmstrongAnd most of all, it means continually drawing connections among these seemingly disparate strugglesโasserting, for instance, that the logic that would cut pensions, food stamps, and health care before increasing taxes on the rich is the same logic that would blast the bedrock of the earth to get the last vapors of gas and the last drops of oil before making the shift to renewable energy.
Naomi KleinThe 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.
Bertrand RussellRiposte of "that old lady in the anecdote who was accused by her nieces of being illogical," Logic! Good gracious! What rubbish! How can I tell what I think till I see what I say?
E. M. ForsterGeneral 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.
William JamesThe conception of the necessary unit of all that is resolves itself into the poverty of the imagination, and a freer logic emancipates us from the straitwaistcoated benevolent institution, which idealism palms off as the totality of being.
Bertrand RussellWhen quite young I can remember I had no thought or wish of surpassing others. I was rather taken with a liking of little arts and bits of learning. My mother carefully fostered a liking for botany, giving me a small microscope and many books, which I yet have. Strange as it may seem, I now believe that botany and the natural system, by exercising discrimination of kinds, is the best of logical exercises. What I may do in logic is perhaps derived from that early attention to botany.
William Stanley JevonsAnd 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.
Jeaniene FrostI 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.
Darin StraussTo argue that we humans are capable of complex multifarious thought and feeling, whereas the sheep's perception is probably limited by lowly sheepish perceptions, is no more to the point than if I were to slaughter and eat you on the grounds that I am a sophisticated personality able to enjoy Mozart, formal logic and cannibalism, whereas your imaginative world seems confined to True Romances and tinned spaghetti.
Brigid BrophyMy goal is simple. All I want to do is re-connect people with animals. Awaken some emotions and some feelings and some logic, that is been buried and suppressed, intentionally, by our society.
Gary YourofskyIf language had been the creation not of poetry but of logic, we should only have one.
Christian Friedrich HebbelYou can't win. Logic has no power over her when her territory has been invaded by heathens.
Mira GrantLogic has its use and metaphysics has its use, but neither of them is of much help in the making of a creed.
Thomas De Witt TalmageBut you see, our society is still trapped in this binary, black/white logic and that has had some very positive implications for our generation. It's had some very negative ones as well and one of the negative ones is that it creates enormous identity problems for people who have one black ancestor and all white ancestors for example.
Henry Louis GatesIt's very disconcerting to have a camera shoved in your face. It's really discombobulating. If you're the least bit nervous you forget what you just said, you can't find your way through, you can't follow the logic of your own statements sometimes. It's a weird sensation. And I think that really helps to lock people in place.
Samantha BeeThe legislation of Quran will spread all over the world, because it agrees with the mind, logic and wisdom.
UnknownThe true Logic for this world is the Calculus of Probabilities, which takes account of the magnitude of the probability.
James Clerk MaxwellI've already written a section in the annual report for next year explaining why I think in one case that the figures on our balance sheet as calculated are wrong. But it's the standard way of doing it. It's holy writ. The SEC wants us to do it that way, and we'll do it that way, and I'll explain why I think it's wrong and shareholders can read it and see whether they agree with my logic or don't.
Warren BuffettWhat I love about directing is finding common ground in complementary palate with wardrobe, set design, the camera department, the makeup department, et cetera. I love figuring out that synergy. To have everything work in concert is amazing, I love working with that kind of logic. Directing is a cavalcade of taste decisions - this one or that one, but I raather enjoy it and am in the process of setting up the next endeavor.
Billy ZaneIt is all about numbers. It is all about sequence. It's the mathematical logic of being alive. If everything kept to its normal progression, we would live with the sadness-cry and then walk-but what really breaks us cleanest are the losses that happen out of order.
Aimee BenderThere may be organic life out there, or maybe machines created by long-dead civilizations, but any signals, even if they are difficult to decode, would tell us that the concepts of logic and physics are not limited to the hardware in human skulls, and will transform our view of the universe.
Martin ReesThere was no logic or any sense of purpose except that I knew I had to do something other than what I was doing, or I might not make it through this.
J.A. RedmerskiMy Master... Say all you wish of me. It does not matter to me:Shallow.. Stupid.. Crazy.. Simple minded. It does not concern me anymore. For whoever writes about her concerns. in the logic of Men is called a stupid woman. and didn't I tell you in the beginning that I am a stupid woman?
Nizar QabbaniDoes the logic connect? What are the range of probably outcomes? You want to figure out what those probabilities are and ideally be the House. It's fine to gamble, as long as you're the House. Also, listen to critical feedback, particularly from friends. Generally they will be thinking it but they won't tell you.
Elon Musk