Khoth comments on Causal Universes - Less Wrong
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What about a universe with really mean laws of physics, like gravity that acts in reverse on particles whose masses aren't computable numbers?
How is that different than "within accuracy t, these particles have those computable masses, but gravity acts backwards on them"?
The intention of my example was that you couldn't tell for a given particle which direction gravity went.
Wouldn't you just need one additional bit of information for each particle as an initial condition to make this computable again?