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>> all of these can be exciting and interesting without pretending that it's closely related to human brains Why do you say they are not closely related? They

>> all of these can be exciting and interesting without pretending that it's closely related to human brains Why do you say they are not closely related? They are certainly an analogy to parts of the human brain. They are inspired by the way real neurons work at some level. But using the word "pretending" you sound as if you think these similarities are pure fiction. Why is that?

nicklecompte 3y ago
I have three basic problems with using "brain" and especially "human brain": 1) Nobody is even bothering to explain why this is like a human brain rather than 1M spider brains or 1B nematode brains - I suspect 1M spider brains is probably closer to reality, and I doubt that adds up to one human. The choice of "human" is a marketing gimmick. 2) Even in nematode brains, each neuron is very different, in a way that can't be explained by a small array of floating-point numbers. These SNN architectures are too homogenous and simple to explain the actual behavior of individual neurons. (See https://www.quantamagazine.org/how-computationally-complex-is-a-single-neuron-20210902/ https://www.quantamagazine.org/how-computationally-complex-i... which discusses standard ANNs, but I strongly doubt a single layer of SNN neurons can actually emulate an individual rat neuron.) 3) Epigenetic effects are clearly important for thinking and memory formation, yet totally ignored by these architectures: https://www.smithsonianmag.com/smart-news/scientists-say-they-have-transferred-memories-between-snails-180969087/ https://www.smithsonianmag.com/smart-news/scientists-say-the...
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Retric 3y ago
Because it’s nowhere close to the scale of the human brain, calling it a mouse brain would be closer. People have 100x the neurons and 10,000x the synaptic connections and wildly different architecture, so it’s really got nothing in more in common with a human brain over some other kind of brain.

nicklecompte 3y ago

I have three basic problems with using "brain" and especially "human brain": 1) Nobody is even bothering to explain why this is like a human brain rather than 1M spider brains or 1B nematode brains - I suspect 1M spider brains is probably closer to reality, and I doubt that adds up to one human. The choice of "human" is a marketing gimmick. 2) Even in nematode brains, each neuron is very different, in a way that can't be explained by a small array of floating-point numbers. These SNN architectures are too homogenous and simple to explain the actual behavior of individual neurons. (See https://www.quantamagazine.org/how-computationally-complex-is-a-single-neuron-20210902/ https://www.quantamagazine.org/how-computationally-complex-i... which discusses standard ANNs, but I strongly doubt a single layer of SNN neurons can actually emulate an individual rat neuron.) 3) Epigenetic effects are clearly important for thinking and memory formation, yet totally ignored by these architectures: https://www.smithsonianmag.com/smart-news/scientists-say-they-have-transferred-memories-between-snails-180969087/ https://www.smithsonianmag.com/smart-news/scientists-say-the...

deleted 3y ago

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Retric 3y ago

Because it’s nowhere close to the scale of the human brain, calling it a mouse brain would be closer. People have 100x the neurons and 10,000x the synaptic connections and wildly different architecture, so it’s really got nothing in more in common with a human brain over some other kind of brain.