“We live in a three-dimensional world, and our brains are organized in three dimensions, so we might as well compute in three dimensions. …Right now, chips, even though they're very dense, are flat.”

—  Ray Kurzweil

"The Singularity," The New Humanists: Science at the Edge (2003)

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Ray Kurzweil photo
Ray Kurzweil 40
Author, scientist, inventor, and futurist 1948

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“The bodies of which the world is composed are solids, and therefore have three dimensions. Now, three is the most perfect number,—it is the first of numbers, for of one we do not speak as a number, of two we say both, but three is the first number of which we say all.”

Aristotle (-384–-321 BC) Classical Greek philosopher, student of Plato and founder of Western philosophy

Moreover, it has a beginning, a middle, and an end.
I. 1. as translated by William Whewell and as quoted by Florian Cajori, A History of Physics in its Elementary Branches (1899) as Aristotle's proof that the world is perfect.
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“Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

As quoted in "Return of the time lord" in The Guardian http://books.guardian.co.uk/departments/scienceandnature/story/0,6000,1579384,00.html (27 September 2005)

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“Rotation through a fourth dimension can’t affect a three-dimensional figure any more than you can shake letters off a printed page.”

Robert A. Heinlein (1907–1988) American science fiction author

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Short fiction, Off the Main Sequence (2005)

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“I despair not that, even here, in this region of Three Dimensions, your Lordship's art may make the Fourth Dimension visible to me; just as in the Land of Two Dimensions my Teacher's skill would fain have opened the eyes of his blind servant to the invisible presence of a Third Dimension, though I saw it not.”

Source: Flatland: A Romance of Many Dimensions (1884), PART II: OTHER WORLDS, Chapter 19. How, Though the Sphere Showed Me Other Mysteries of Spaceland, I Still Desired More; and What Came of It
Context: I despair not that, even here, in this region of Three Dimensions, your Lordship's art may make the Fourth Dimension visible to me; just as in the Land of Two Dimensions my Teacher's skill would fain have opened the eyes of his blind servant to the invisible presence of a Third Dimension, though I saw it not.Let me recall the past. Was I not taught below that when I saw a Line and inferred a Plane, I in reality saw a Third unrecognized Dimension, not the same as brightness, called "height"? And does it not now follow that, in this region, when I see a Plane and infer a Solid, I really see a Fourth unrecognized Dimension, not the same as colour, but existent, though infinitesimal and incapable of measurement?

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“He made the characters a lot more three-dimensional. It's still a 'B' movie and it's still kinda campy. Now it's these really well-developed characters, really three-dimensional.”

John Leguizamo (1964) Colombian and American actor, film producer, voice artist, and comedian

John Leguizamo Talks About "Assault on Precinct 13", January 16, 2005.

“Scientology and all the other cults are one-dimensional, and we live in a three-dimensional world. Cults are as dangerous as drugs. They commit the highest crime: the rape of the soul.”

Ronald DeWolf (1934–1991) American critic of Scientology

Interview in Penthouse (June 1983)
Context: I don't think that anyone should think for you. And that's exactly what cults do. All cults, including Scientology, say, "I am your mind, I am your brain. I've done all the work for you, I've laid the path open for you. All you have to do is turn your mind off and walk down the path I have created." Well, I have learned that there's great strength in diversity, that a clamorous discussion or debate is very healthy and should be encouraged. That's why I like our political setup in the United States: simply because you can fight and argue and jump up and down and shout and scream and have all kinds of viewpoints, regardless of how wrongheaded or ridiculous they might be. People here don't have to give up their right to perceive things the way they believe. Scientology and all the other cults are one-dimensional, and we live in a three-dimensional world. Cults are as dangerous as drugs. They commit the highest crime: the rape of the soul.

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