khafra comments on Causal Universes - Less Wrong

60 Post author: Eliezer_Yudkowsky 29 November 2012 04:08AM

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Comment author: khafra 28 November 2012 03:36:12PM 1 point [-]

If this universe contains agents who engage in acausal trade, does that make it partially acausal?

Comment author: Eliezer_Yudkowsky 28 November 2012 06:01:14PM 4 points [-]

Nope. It's just a terrible name.

Comment author: khafra 28 November 2012 06:22:55PM 1 point [-]

I almost went with that answer, and didn't ask. But then I thought about trade with future agents who have different resources and values than we do--resources and values which will be heavily influenced by what we do today. The structure seems to be at least as similar as self-consistent solutions in plasma physics.

Comment author: CCC 28 November 2012 04:29:43PM 1 point [-]

By 'acausal trade', do you mean:

  • Trading based on a present expectation of the future (such as trading in pork futures)

or

  • Trading based on data from the actual future

The first is causal (but does not preclude the possibility of the universe containing other acausal effects), the second is acausal.

Comment author: Vladimir_Nesov 28 November 2012 07:27:00PM *  1 point [-]

Agents can make choices that enforce global logical constraints, using computational devices that run on local causality.

Comment author: khafra 29 November 2012 12:00:59PM 0 points [-]

Thanks, I feel like I grok this answer: There may be higher order acausal structures in the universe, but they run on a causal substrate.

Comment author: Manfred 28 November 2012 05:09:37PM -1 points [-]

Nope.