Lack of invariant scaling.

 

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But, it’s possible that MOST of the halting problem could be solved by cellular automata which are also turing machines which comprise a turning machine.

I suspect it might need a 3rd scaling.

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Infinite might not be needed though. If it is a functionally layered system, they could just be looking at each other from every angle of granularity.

One would be missing of course.

But if the granularity is fine enough, it might not matter.

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