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David Deutsch citáty

David Elieser Deutsch is a British physicist at the University of Oxford. He is a Visiting Professor in the Department of Atomic and Laser Physics at the Centre for Quantum Computation in the Clarendon Laboratory of the University of Oxford. He pioneered the field of quantum computation by formulating a description for a quantum Turing machine, as well as specifying an algorithm designed to run on a quantum computer. He has also proposed the use of entangled states and Bell's theorem for quantum key distribution

and is a proponent of the many-worlds interpretation of quantum mechanics.In 2009, Deutsch expounded a new criterion for scientific explanation, which is to formulate invariants: 'State an explanation [publicly, so that it can be dated and verified by others later] that remains invariant [in the face of apparent change, new information, or unexpected conditions]'.

A bad explanation is easy to vary. —David Deutsch

The search for hard-to-vary explanations is the origin of all progress. —David Deutsch

That "the truth consists of hard-to-vary assertions about reality" is the most important fact about the physical world. —David Deutsch Wikipedia  

✵ 1953
David Deutsch fotka
David Deutsch: 20   citátov 5   Páči sa

David Deutsch: Citáty v angličtine

“Reality contains not only evidence, but also the means (such as our minds, and our artefacts) of understanding it. There are mathematical symbols in physical reality. The fact that it is we who put them there does not make them any less physical.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch.3

“Our best theories are not only truer than common sense, they make more sense than common sense…”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“To say that prediction is the purpose of a scientific theory is to confuse means with ends. It is like saying that the purpose of a spaceship is to burn fuel. … Passing experimental tests is only one of many things a theory has to do to achieve the real purpose of science, which is to explain the world.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 1

“The quantum theory of parallel universes is not the problem, it is the solution.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 2
Kontext: The quantum theory of parallel universes is not the problem, it is the solution. It is not some troublesome, optional interpretation emerging from arcane theoretical considerations. It is the explanation—the only one that is tenable—of a remarkable and counter-intuitive reality.

“To say that prediction is the purpose of a scientific theory is to confuse means with ends. It is like saying that the purpose of a spaceship is to burn fuel.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 1
Kontext: To say that prediction is the purpose of a scientific theory is to confuse means with ends. It is like saying that the purpose of a spaceship is to burn fuel. … Passing experimental tests is only one of many things a theory has to do to achieve the real purpose of science, which is to explain the world.

“Quantum computation is … nothing less than a distinctly new way of harnessing nature”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 9 : Quantum Computers
Kontext: Quantum computation is … nothing less than a distinctly new way of harnessing nature … It will be the first technology that allows useful tasks to be performed in collaboration between parallel universes, and then sharing the results.

“Since building a universal virtual-reality generator is physically possible, it must actually be built in some universes.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 6

“Mathematical knowledge may, just like our scientific knowledge, be deep and broad, it may be subtle and wonderfully explanatory, it may be uncontroversially accepted; but it cannot be certain.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 10

“The rational thing for a layperson to do is to take seriously the prevailing scientific theory.”

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David Deutsch

TED Talks

“Kuhn's theory suffers from a fatal flaw. It explains the succession from one paradigm to another in sociological or psychological terms, rather than as having primarily to do with the objective merit of the rival explanations. Yet unless one understands science as a quest for explanations, the fact that it does find successive explanations, each objectively better than the last, is inexplicable.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 13; commentary on the ideas of Thomas Kuhn, as presented in the book The Structure of Scientific Revolutions

“Time travel may be achieved one day, or it may not. But if it is, it should not require any fundamental change in world-view, at least for those who broadly share the world view I am presenting in this book.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 12

“The next chapter is likely to provoke many mathematicians. This can't be helped. Mathematics is not what they think it is.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 10

“As I understand it, the claim is that the less you use Homeopathy, the better it works. Sounds plausible to me.”

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David Deutsch

http://web.archive.org/web/20040817050226/http://www.qubit.org/people/david/index.php?blog=20040808030513
Weblog

“Think of all our knowledge-generating processes, our whole culture and civilization, and all the thought processes in the minds of every individual, and indeed the entire evolving biosphere as well, as being a gigantic computation. The whole thing is executing a self-motivated, self-generating computer program. More specifically it is, as I have mentioned, a virtual-reality program in the process of rendering, with ever-increasing accuracy, the whole of existence.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“A prediction, or any assertion, that cannot be defended might still be true, but an explanation that cannot be defended is not an explanation.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“The truly privileged theories are not the ones referring to any particular scale of size or complexity, nor the ones situated at any particular level of the predictive hierarchy—but the ones that contain the deepest explanations.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“It is possible to build a virtual-reality generator whose repertoire includes every possible environment.”

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David Deutsch kniha The Fabric of Reality

Zdroj: The Fabric of Reality (1997), Ch. 6

“Necessary truth is merely the subject-matter of mathematics, not the reward we get for doing mathematics. The object of mathematics is not, and cannot be, mathematical certainty. It is not even mathematical truth, certain or otherwise. It is, and must be, mathematical explanation.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

“Surely it is more interesting to argue about what the truth is, than about what some particular thinker, however great, did or did not think.”

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David Deutsch kniha The Fabric of Reality

The Fabric of Reality (1997)

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