# Quote — Nick Herbert, Quantum Reality

> If a friend in Texas seals a silver coin in one envelope and a gold coin in another and mails the envelopes to Tokyo and London, the instant you open you envelope in Japan you know the contents of my envelope in England. But opening your letter causes no physical change in England (faster-than-light or otherwise) but merely involves a change in your knowledge concerning something happening far away and outside your control.

- Author: [Nick Herbert](https://www.leafyquotes.com/nick-herbert.md)
- Book: [Quantum Reality](https://www.leafyquotes.com/nick-herbert/quantum-reality.md)
- Page: 171
- Source: [Wikiquote](https://en.wikiquote.org/wiki/Nick_Herbert_(physicist)#Quantum_Reality_-_Beyond_The_New_Physics) ([CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/))
- Quote page: https://www.leafyquotes.com/nick-herbert/quantum-reality/if-a-friend

## More from this book

> Non-local influences do not diminish with distance. They are as potent at a million miles as at a millimeter.
>
> Non-local influences act instantaneously. The speed of their transmission is not limited by the velocity of light.
>
> A non-local interaction links up one location with another without crossing space, without decay, and without delay. A non-local interaction is, in short, unmediated, unmitigated, and immediate.

p. 214 — [Quote page](https://www.leafyquotes.com/nick-herbert/quantum-reality/non-local-influences-do-not.md)

> Bell himself managed to devise such a proof which rejects all models of reality possessing the property of "locality". This proof has since become known as Bells theorem. It asserts that no local model of reality can underlie the quantum facts. Bell's theorem says that reality must be non-local.

p. 212 — [Quote page](https://www.leafyquotes.com/nick-herbert/quantum-reality/bell-himself-managed.md)

> Physicists continue to debate whether Bell's theorem is airtight or not. However, the real question is not whether Bell can prove beyond doubt that reality is non-local, but whether the world is in fact no-local.

p. 238 — [Quote page](https://www.leafyquotes.com/nick-herbert/quantum-reality/physicists-continue-to-debate.md)