Stathis Papaioannou wrote:

> I'm not necessarily talking about every possible computation being 
> implemented by
> every physical system, just (at least) the subset of finite computations 
> implemented by
> a physical computer or brain. I think this is another way of saying that a 
> recording, or
> a single trace of a computation branching in the multiverse, can be 
> conscious. To prevent
> a recording being consious yoiu can insist on counterfactual behaviour, but 
> that seems an
> ad hoc requirement introduced simply to prevent the "trivial" case of a 
> recording or any
> physical system implementing a computation.

The requirement that computations require counterfactuals isn't
ad hoc, it comes from the observation that computer programmes
include if-then statements.

The idea that everyting is conscious unless there is a good
reason it isn't -- *that* is ad hoc!

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