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Stephen Wolfram

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4069 total appearances
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Podcast Appearances

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

it's possible for an underlying microscopic theory to imply special relativity, to be able to derive it.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

It's not something you put in as a, this is a, it's something where this other property, causal invariance, which is also the property that implies that there's a single thread of time in the universe.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

It might not be the case.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

That's what would lead to the possibility of an observer thinking that definite stuff happens.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

Otherwise, you've got all these possible rewriting orders, and who's to say which one occurred?

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

But with this causal invariance property, there's a notion of a definite thread of time.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

Oh, yeah.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

No, no.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

A fundamental level, all you've got is a bunch of nodes connected by hyper-edges or whatever.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

So there's no time, there's no space.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

That's right.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

But the thing is that it's just like imagining, imagine you're just dealing with a graph.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

And imagine you have something like a honeycomb graph where you have a bunch of hexagons.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

That graph, at a microscopic level, it's just a bunch of nodes connected to other nodes.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

But at a macroscopic level, you say that looks like a honeycomb lattice.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

It looks like a two-dimensional manifold of some kind.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

It looks like a two-dimensional thing.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

If you connect it differently, if you just connect all the nodes one to another in kind of a sort of linked list type structure, then you'd say, well, that looks like a one-dimensional space.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

But at the microscopic level, all these are just networks with nodes.

Lex Fridman Podcast
#89 – Stephen Wolfram: Cellular Automata, Computation, and Physics

The microscopic level, they look like something that's like one of our sort of familiar kinds of space.