It's been a very busy week. I will reply to the measure thread (which is 
actually more important) but that could be in a few days.

--- On Thu, 1/28/10, Jason Resch <> wrote:
> What about if half of your neurons were 1/2 their normal size, and the other 
> half were twice their normal size?  How would this be predicted to effect 
> your measure?

If it had any effect - and as I said, I don't think it would in a QM universe - 
I guess it would decrease the measure of part of your brain and increase that 
of the other part.  That may sound weird but it's certainly possible for one 
part of a parallel computation to have more measure than the rest which can be 
done by duplicating only that part of the brain.  See my paper on partial 

--- On Thu, 1/28/10, Stathis Papaioannou <> wrote:
> Do you think that simply doubling up the size of electronic components (much 
> easier to do than making brains bigger) would double measure?

The effect should be the same for brains or electronics.

> You could then flick the switch and alternate between two separate but 
> parallel circuits or one circuit. Would flicking the switch cause a 
> doubling/halving of measure? 

If the circuits don't interact, then it is two separate implementations, and 
measure would double.  If they do interact, we are back to 'big components' 
which as I said could go either way.

> Would it be tantamount to killing one of the consciousnesses every time you 
> did it?

Basically.  Killing usually implies an irreversible process; otherwise, someone 
is liable to come along and flick the switch back, so it's more like knocking 
someone out.  If the measure is halved and then you break the switch so it 
can't go back, that would be, yes.

--- On Thu, 1/28/10, Bruno Marchal <> wrote:
> Does the size of the components affects the computation?

Other than measure, the implemented computation would be the same, at least for 
the cases that matter.

> I don't assume the quantum stuff. It is what I want to understand. I gave an 
> argument showing that if we assume computationalism, then we have to derive 
> physics from (classical) computer science

Of course I know about your argument. It's false.

> You wrote convincing posts on the implementation problem. I thought, and 
> still think, that you understood that there is no obvious way to attribute a 
> computation to a physical process. With strict criteria we get nothing, with 
> weak criteria even a rock thinks.

The implementation problem is: Given a physical or mathematical system, does it 
implement a given computation?  As you say, if the answer is always "yes" - as 
it is on a naive definition of implementation - then computationalism can not 

This was an important problem - which I presented a solution for in my '07 MCI 

So I now consider it a solved problem, using my CSSA framework.  The solution 
presented there does need a bit of refinement and I plan to write up a separate 
paper to present it more clearly and hopefully get some attention for it, but 
the main ideas are there.

But that's only half the story.  There is still the measure problem: Given that 
a system does implement some set of computations, what is the measure for each? 
 Without the answer to that, you can't predict what a typical observer would 
see.  This problem remains unsolved (though I do have proposals in the paper) 
and relates to the problem of size.


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