Stathis Papaioannou wrote:
> Brent Meeker writes:
> 
> 
>>Almost is not completely.  In any case, I don't think consciousness is 
>>maintained 
>>indefinitely with no inputs.  I think a "brain-in-a-vat" would go into an 
>>endless 
>>loop without external stimulus.
> 
> 
> That's an assumption, 

No, it has empirical support. It is what is reported by people in extended 
sensory 
deprivation experiments.

>but even if true it would only say something about the 
> nature of human brains. It is easy enough to imagine a brain with 
> self-excitatory 
> neurons that provide the same kind of input as the environment does, 
> modulating
> their activity in response to feedback from other neurons. It would just be a 
> technical problem to ensure that it didn't go into an endless loop.

Without inherent (quantum) randomness?  I don't think so.  Close deterministic 
systems have a Poincare return time.

Brent Meeker


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