X-Message-Number: 26028
Date: Fri, 15 Apr 2005 14:12:29 EDT
Subject: Re: to T. Donaldson

you said:

> In my discussion of your proposed way to build a mind-computer, I 
> pointed out several points which you seem to have forgotten. The
> major point, however, is quite simple: when a computer acts like
> a mind, TIME SHARING IS WORTHLESS. Every one of your processors
> is connected in a net, but each one acts differently AT THE SAME
> TIME. And if you propose to build a mind-computer with time sharing,
> it simply won't work in the real world --- which is where I believe
> you want it to work.

I have said that before, but I put it again here : This come from the Shannon 
theorem : If an analogic signal has a maximum frequency F, then sampling it 
at 2F recover all the information.

Assume the shortest signal has a duration near 2 ms in a neuron, then 

sampling it at 1 ms is sufficient.  If you work out that information in, say, 
100 ns, 
then you can use the time sharing process to do that on 10,000 such 

informations before you need to go back to the first signal for the next data. 
This is 
exploited in computers back from the era of IBM 360,  45 years ago.

> I don't like repeating myself, but perhaps you simply didn't save
> my message. Turing did good work for his time, but he wasn't
> seriously trying to make a computer that acted like a brain. And
> in brains, precisely because time matters, our neurons work 
> simultaneously. Not time sharing, but simultaneously.

A brain uploaded on an electronics system, not an ordinary computer, will 

have a material support as different from a biological brain as a plane is from 

 Given the> 
> number of parts even you think will likely be needed to make 
> a mind-computer, the speed of those individual parts remains
> too slow. 

Any proof?

> The second problem is that of growth. Your proposed brain cannot
> grow new neurons (at least you haven't discussed how that could
> happen). 

This is a rather simple process for a software based system. I have not yet 

discussed it indeed in much detail, but this is one of the most trivial problem
to solve.

> As for your reading, I note a lack of books specifically on how
> our brains and the cells which make them up work. Have you read the
> Byrne and Roberts book FROM MOLECULES TO NETWORKS? 

Yes, I have, as some other...

Yvan Bozzonetti.

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