[thanksgiving]

A friend showed me some python code or something that demonstrates facial recognition by calculating the distance between facial features - eyes, nose...

I had never thought about this before but how do I recognize faces? I mostly recognize faces by context. And I don't have to match against a billion faces, probably a hundred or so? And I still suck at this.

The fact that human brain works with 0.3 kW per day likely doesn't mean much. How do we even start asking the question - is a human brain thermally (or resource in general) constrained?

[hnaccount_rng]

The brain is responsible for about 1/5 of the total energy expenditure (and therefore food requirement)of a human body. So yes, on a biological level, there is significant resource constraints on a human brain. What is less clear is whether this actually holds for the “computing” part (as contrasted with the “sustainment”, think cell replacement, part)

[throwaway48476]

My brain is noticeably thermally constrained every summer.