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Today in Science History - Quickie Quiz
Who said: “As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”
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Let Quotes (47 quotes)

Every teacher certainly should know something of non-euclidean geometry. Thus, it forms one of the few parts of mathematics which, at least in scattered catch-words, is talked about in wide circles, so that any teacher may be asked about it at any moment. ... Imagine a teacher of physics who is unable to say anything about Röntgen rays, or about radium. A teacher of mathematics who could give no answer to questions about non-euclidean geometry would not make a better impression.
On the other hand, I should like to advise emphatically against bringing non-euclidean into regular school instruction (i.e., beyond occasional suggestions, upon inquiry by interested pupils), as enthusiasts are always recommending. Let us be satisfied if the preceding advice is followed and if the pupils learn to really understand euclidean geometry. After all, it is in order for the teacher to know a little more than the average pupil.
In George Edward Martin, The Foundations of Geometry and the Non-Euclidean Plane (1982), 72.
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A computer lets you make more mistakes faster than any invention in human history—with the possible exceptions of handguns and tequila.
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Are you aware that humanity is just a blip? Not even a blip. Just a fraction of a fraction of what the universe has been and will become? Talk about perspective. I figure I can’t feel so entirely stupid about saying what I said because, first of all, it’s true. And second of all, there will be no remnant of me or my stupidity. No fossil or geographical shift that can document, really, even the most important historical human beings, let alone my paltry admissions.
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But does Man have any “right” to spread through the universe? Man is what he is, a wild animal with the will to survive, and (so far) the ability, against all competition. Unless one accepts that, anything one says about morals, war, politics, you name it, is nonsense. Correct morals arise from knowing what man is, not what do-gooders and well-meaning old Aunt Nellies would like him to be. The Universe will let us know - later - whether or not Man has any “right” to expand through it.
Starship Troopers
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Create a vision and never let the environment, other people’s beliefs, or the limits of what has been done in the past shape your decisions. Ignore conventional wisdom.
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Do not let what you cannot do interfere with what you can do.
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English physicians kill you, the French let you die.
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For a smart material to be able to send out a more complex signal it needs to be nonlinear. If you hit a tuning fork twice as hard it will ring twice as loud but still at the same frequency. That’s a linear response. If you hit a person twice as hard they’re unlikely just to shout twice as loud. That property lets you learn more about the person than the tuning fork. - When Things Start to Think, 1999.
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Gentlemen, everyone in this room knows the difference between a live horse and a dead horse. Pray, therefore, let us cease flogging the latter.
(in conversation)
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He who finds a thought that lets us even a little deeper into the eternal mystery of nature has been granted great peace.
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Hold fast to dreams,
Let them stay with you forever.
Don’t let them die.
You might fly up in the sky
On a silver unicorn’s back,
Dreaming of the ocean,
Listening to the dolphins sing.
Dreams, hold on to them forever.
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Humans everywhere share the same goals when the context is large enough. And the study of the Cosmos provides the largest possible context … . If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another … . If we are to survive, our loyalties must be broadened further, to include the whole human community, the entire planet Earth.
Cosmos
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If a man can have only one kind of sense, let him have common sense. If he has that an uncommon sense too, he is not far from genius.
In Hialmer Day Gould, New Practical Spelling (1905), 13.
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If thou hast knowledge, let others light their candle at thine.
In Introductio ad Prudentiam: or, Directions, Counsels, and Cautions, Tending to Prudent Management of Affairs in Common Life (1727), Part II, 2, Moral No. 1784. Often seen incorrectly attributed to Sarah Margaret Fuller or Winston Churchill, slightly reworded, for example, as “If you have knowledge, let others light their candles with it.”
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It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
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It is inexcusable for scientists to torture animals; let them make their experiments on journalists and politicians.
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It is so hard for an evolutionary biologist to write about extinction caused by human stupidity ... Let me then float an unconventional plea, the inverse of the usual argument ... The extinction of Partula is unfair to Partula. That is the conventional argument, and I do not challenge its primacy. But we need a humanistic ecology as well, both for the practical reason that people will always touch people more than snails do or can, and for the moral reason that humans are legitimately the measure of all ethical questions–for these are our issues, not nature’s.
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Just as knowing how a magic trick is done spoils its wonder, so let us be grateful that wherever science and reason turn they finally plunge into darkness.
John Mitchinson and John Lloyd, If Ignorance Is Bliss, Why Aren't There More Happy People?: Smart Quotes for Dumb Times (2009), 274.
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Learning how to access a continuity of common sense can be one of your most efficient accomplishments in this decade. Can you imagine common sense surpassing science and technology in the quest to unravel the human stress mess? In time, society will have a new measure for confirming truth. It’s inside the people-not at the mercy of current scientific methodology. Let scientists facilitate discovery, but not invent your inner truth.
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Let him who would enjoy a good future waste none of his present.
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Let me arrest thy thoughts; wonder with me, why plowing, building, ruling and the rest, or most of those arts, whence our lives are blest, by cursed Cain’s race invented be, and blest Seth vexed us with Astronomy.
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Let Nature be your teacher
In poem, 'The Tables Turned: An evening Scene, on the Same Subject', Lyrical Ballads: With a Few Other Poems (1798), 187.
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Let no one suppose that the words doctor and patient can disguise from the parties the fact that they are employer and employee.
In 'Preface on Doctors', The Doctor's Dilemma (1909, 1911), lxxxi.
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Let the artist have just enough to eat, and the tools of this trade: ask nothing of him. Materially make the life of the artist sufficiently miserable to be unattractive, and no-one will take to art save those in whom the divine daemon is absolute.
In Art (1958), 172.
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Let us seek to fathom those things that are fathomable and reserve those things which are unfathomable for reverence in quietude.

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My political ideal is democracy. Let every man be respected as an individual and no man idolized.
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Never let your sense of morals prevent you from doing what is right.
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Of Neptune’s empire let us sing…
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One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.
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Our time is distinguished by wonderful achievements in the fields of scientific understanding and the technical application of those insights. Who would not be cheered by this? But let us not forget that human knowledge and skills alone cannot lead humanity to a happy and dignified life. Humanity has every reason to place the proclaimers of high moral standards and values above the discoverers of objective truth.
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Sex is a natural function. You can’t make it happen, but you can teach people to let it happen.
NY Times 29 Oct 84
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Should a person do good, let him do it again and again. Let him find pleasure therein, for blissful is the accumulation of good.
Buddha
The Dhammapada. Quoted in Kim Lim (ed.), 1,001 Pearls of Spiritual Wisdom: Words to Enrich, Inspire, and Guide Your Life (2014), 236
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Something will have gone out of us as a people if we ever let the remaining wilderness be destroyed; if we permit the last virgin for-ests to be turned into comic books and plastic cigarette cases; if we drive the few remaining members of the wild species into zoos or to extinction; if we pollute the last clean air and dirty the last clean streams and push our paved roads through the last of the silence, so that never again will Americans be free in their own country from the noise, the exhausts, the stinks of human and automotive waste.
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Surrender. Let silence have you. And if you find you are still swimming on the surface of the ocean, let go and sink into the depths of love.
Quoted in Kim Lim (ed.), 1,001 Pearls of Spiritual Wisdom: Words to Enrich, Inspire, and Guide Your Life (2014), 189
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The argument of the ‘long view’ may be correct in some meaninglessly abstract sense, but it represents a fundamental mistake in categories and time scales. Our only legitimate long view extends to our children and our children’s children’s children–hundreds or a few thousands of years down the road. If we let the slaughter continue, they will share a bleak world with rats, dogs, cockroaches, pigeons, and mosquitoes. A potential recovery millions of years later has no meaning at our appropriate scale.
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The easiest thing to be in the world is you. The most difficult thing to be is what other people want you to be. Don’t let them put you in that position.
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The ideal government of all reflective men, from Aristotle onward, is one which lets the individual alone–one which barely escapes being no government at all. This ideal, I believe, will be realized in the world twenty or thirty centuries after I have passed from these scenes and taken up my public duties in Hell.
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The last few meters up to the summit no longer seem so hard. On reaching the top, I sit down and let my legs dangle into space. I don’t have to climb anymore. I pull my camera from my rucksack and, in my down mittens, fumble a long time with the batteries before I have it working properly. Then I film Peter. Now, after the hours of torment, which indeed I didn’t recognize as torment, now, when the monotonous motion of plodding upwards is at an end, and I have nothing more to do than breathe, a great peace floods my whole being. I breathe like someone who has run the race of his life and knows that he may now rest forever. I keep looking all around, because the first time I didn’t see anything of the panorama I had expected from Everest, neither indeed did I notice how the wind was continually chasing snow across the summit. In my state of spiritual abstraction, I no longer belong to myself and to my eyesight. I am nothing more than a single, narrow, gasping lung, floating over the mists and the summits.
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The vast spread
Of darkness
That speaks of mystery
The darkness that reveals
The beauty that lies beneath
In the form of glittering
Stars, a countless beauty
That seemed to conceal
A million stories
That can make the mankind
Take a new look at life
And the majestic moon
That silently looks at mankind
Wondering how its serenity
Was disturbed by the little steps
Of a man from the beautiful earth
Yet softly smiling back
And let the world sleep
In its magical glow
A glow that soothes
The world’s senses
And forget the pain of reality
…...
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They say that the best weapon is the one you never have to fire. I respectfully disagree. I prefer the weapon you only have to fire once. That’s how Dad did it, that’s how America does it... and it’s worked out pretty well so far. I present to you the newest in Stark Industries’ Freedom line. Find an excuse to let one of these off the chain, and I personally guarantee, the bad guys won’t even wanna come out of their caves. Ladies and gentlemen, for your consideration... the Jericho.
…...
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Think impossible and dreams get discarded, projects get abandoned, and hope for wellness is torpedoed. But let someone yell the words it’s possible, and resources we hadn’t been aware of come rushing in to assist us in our quest.
…...
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Treat your password like your toothbrush. Don’t let anybody else use it, and get a new one every six months.
…...
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We grow great by dreams. All big men are dreamers. They see things in the soft haze of a spring day or in the red fire of a long winter’s evening. Some of us let these great dreams die, but others nourish and protect them; nurse them through bad days till they bring them to the sunshine and light which comes always to those who sincerely hope that their dreams will come true.
…...
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We should stop the non-scientific, pseudo-scientific, and anti-scientific nonsense emanating from the right wing, and start demanding immediate action to reduce global warming and prevent catastrophic climate change that may be on our horizon now. We must not let the [Bush] Administration distort science and rewrite and manipulate scientific reports in other areas. We must not let it turn the Environmental Protection Agency into the Environmental Pollution Agency.
Address to National Press Club, Washington, DC (12 Jan 2005). In Bill Adler (ed.), The Wit and Wisdom of Ted Kennedy (2011).
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Whatever you can teach him from the nature of things themselves, do not teach him by words. Leave him to himself to see, hear, find, stumble, rise again, and be mistaken. Give no words when action or deed is possible. What he can do for himself, let him do.
…...
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When I orbited the Earth in a spaceship, I saw for the first time how beautiful our planet is. Mankind, let us preserve and increase this beauty, and not destroy it!
…...
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Yet I also appreciate that we cannot win this battle to save species and environments without forging an emotional bond between ourselves and nature as well–for we will not fight to save what we do not love (but only appreciate in some abstract sense). So let them all continue–the films, the books, the television programs, the zoos, the little half acre of ecological preserve in any community, the primary school lessons, the museum demonstrations, even ... the 6:00 A.M. bird walks. Let them continue and expand because we must have visceral contact in order to love. We really must make room for nature in our hearts.
…...
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Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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- 90 -
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- 80 -
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- 70 -
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- 60 -
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- 50 -
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- 40 -
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- 30 -
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- 20 -
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- 10 -
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