On Sun, Aug 30, 2015 at 07:46:33PM -0400, Jason Resch wrote: > > There's roughly a 100x increase in number of neurons, scaling from the > nematode to the fruit fly, to the mouse, cat, and then human. If efficiency > and power of computers for a given cost continue to double, then what it > costs now to simulate a nematode brain, we will in 7 years (assuming > doubling per year) be able to simulate a fruit fly brain. Seven years > later, for the same cost, we will be able to simulate a mouse brain. Seven > years later, a cat brain, and then finally, 28 years later, we'll be able > to simulate neural networks with the same complexity of a human brain.
Historically, the rate of doubling is every 18 months, or 5 years for an order of magnitude. So your numbers are 10 years to fruit fly, 20 to mouse and 30 to human brain resp. But computational cost goes up faster than linearly with neuron count, because the actual cost also depends on axon connectivity. IIRC, this is something like xlog(x) complexity. So it might be a bit further out for human complexity. > > > > > One intersting test I'd like to see is applying Tononi's integrated > > information measure to these simple creatures to see if they're > > producing any integrated information. I suspect Integrated Information > > is a necessary requirement for conscious, but not so sure about > > sufficiency. > > > > Doesn't a NAND operation produce integrated information? Really? Did you have a cite for this? It seems we're in > danger of basing our answers to the binary question "is it conscious?" on > purely quantitative, rather than qualitative differences in computations. > How many neurons do you think are required to implement the algorithms you > consider necessary for consciousness? > I haven't fully grokked this, but I would have thought Tononi's measure was at least normalised by the size of the system in question. A system of a billion uncoordinated nand gates will produce very low amounts of integrated information. -- ---------------------------------------------------------------------------- Prof Russell Standish Phone 0425 253119 (mobile) Principal, High Performance Coders Visiting Professor of Mathematics hpco...@hpcoders.com.au University of New South Wales http://www.hpcoders.com.au ---------------------------------------------------------------------------- -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
