chaosmosis comments on The Fabric of Real Things - Less Wrong

16 Post author: Eliezer_Yudkowsky 12 October 2012 02:11AM

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Comment author: thomblake 12 October 2012 07:43:40PM 2 points [-]

In a simulated universe this could be as "simple" as detecting that a certain computation is likely to discover its simulated nature and disallow this computation by altering the inputs.

But mixing "certain computation" and "discover" like that is mixing syntax and semantics - in order to watch out for that occurrence, you'd have to be aware of all possible semantics for a certain computation, to know if it counts as a "discovery".

Comment author: chaosmosis 12 October 2012 07:54:48PM *  0 points [-]

Yeah, thanks. This is part of what I was trying to get at. And I'm further contending that if the semantics for every possible scientific experiment were invalidated, then in doing so the hypothetical Great Psychicator would also have to invalidate the semantics for any legitimate claims that psychic powers worked. The two categories overlap perfectly.

This isn't intended to be an argument from definition, I hope that is also clear.