Ah the famous Juergen Schmidhuber! :)

Is the universe a computer.  Well, if you define 'universe' to mean
'everything which exists' and you're a mathematical platonist and grant
reality to infinite sets and uncomputables, the answer must be NO,
since if uncomputable numbers are objectively real (strong platonism)
they are 'things' and therefore 'part of the universe' which are by
definition not computable.

But if by 'universe' you just mean 'physical reality' or 'discrete
mathematics' or you refuse to grant platonic reality to uncomputables
or infinite sets (anti-platonism or weaker platonism) then the answer
could be YES, the universe is a computer.

Cheers!


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