On Sat, Dec 8, 2012 at 2:07 AM, Matt Mahoney <[email protected]> wrote:
> The abstract doesn't mention AI. I estimate the cost of automating the
> global economy, i.e. replacing all human labor.

Except replacing _all_ human labor  is neither possible nor necessary.
Not possible because some will be retained for reasons of politics,
conspicuous consumption etc. (even today conspicuous consumption
drives a market for handmade goods of  higher price and lower quality
than their machine made counterparts). Not necessary because replacing
most labor gets you most of the benefit. There was a time when people
talked about how fully automated  self replicating factories  would
magically transform the economy. In reality it turned out replacing
the 90%  of mind-deadeningly monotonous jobs  conferred a big enough
benefit that it didn't matter all that much that it was vastly harder
to replace the remaining 10% of jobs that actually needed
intelligence.

> I stated the assumption that doing the work of 10^10 people will
> require computing power equivalent to 10^10 human brain sized neural
> networks.

Sure,  unless it doesn't. A lot of human jobs don't actually need full
human intelligence. Conversely we might end up using more than a human
brain's worth of processing power on a lot of problems, maybe because
we haven't had millions of years to optimize the algorithms, maybe
because we are dealing with exponential search problems that have
unlimited appetite for computing power, maybe because the standard
required to be competitive will keep going up as more computing power
is available. The truth is we don't know how much computing power will
be involved.

> Nobody has made a molecular scale self replicating robot. Perhaps you
> can explain why such a thing would be impossible.

Even the hard-core 'nanotechnology will be magic fairy dust' advocates
these days are acknowledging such a thing is unlikely to be developed
because it would cost a fortune while being of little use.


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AGI
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