On 31 July 2014 06:36, Russell Standish <[email protected]> wrote:

> The MGA, in particular, is very subtle. I think I have now found a way
> of coming to grips with it, and it is a little different to the usual
> precis given here. Fundamentally, computational supervenience (which
> requires counterfactual correctness, a factor often overlooked in the
> summaries) is incompatible with physical supervenience, but only in a
> single universe, not a multiverse. Since physical supervenience is
> well supported empirically (something JC has banged on a bit about, as
> well as Brent), the only way of rescuing computational supervenience
> is to insist that we do, in fact, live in a multiverse. But that multiverse
> entails the universal dovetailer, or at least enough of it to emulate
> consciousness, which suffices to get the reversal result of step 7.
>

I always run aground on those counterfactuals - that is I can't see the
point of them. I hope your coming paper will help me out! I look forward to
it. :-)

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