bradrn wrote: ↑Fri Feb 28, 2025 3:19 am
Oh, really? Why? What makes human brains the upper limit of possible intelligence?
I have reservations about the question itself. One first question is, is 'intelligence' even a unitary thing?
We group a number of things human do is 'intelligence' -- and even what we group together is highly dependent on culture. We don't really count being good at sports as intelligence (we do depict athletes and high school jocks as a little dumbs), but the ancient Greeks did which frankly, makes more sense (the brain works just as much during a football as during a math exam)
We do distinguish culture, wisdom, erudition, book smarts, street smarts, IQ and EQ and so on... All of this is processed by the brain, of course, but so does everything.
We're all aware of being very smart when it comes to certain areas, and very stupid when it comes to others. That definitely fits my own experience anyway
OK, let's assume human intelligence is really a single quality (oversimplifying the case a bit.)
Is it a measurable quality? Can we measure intelligence?
We can measure computer's capabilities in megaflops or terabytes, or by number of transistors. For starters, the brain doesn't work like a computer, it doesn't store data in the same way (to the extent we can talk about the brain storing data!)
The first idea is brain size. This works in paleontology, to some extent (Neanderthal had a bigger brain than we do.) Yet smart people turn out to have the same hardware than stupid people. (They never did find anything unusual with Einstein's brain.)
How about IQ? IQ is a poor tool that doesn't measure much, there are many known issues (many of which discusses in the
Mismeasure of Man). It's widely known as unreliable. I've never taken an IQ test, so maybe I'm wrong, but as far as I know, it's heavy on verbal skills and memorization; this runs into the problem of multiple intelligences I mentioned earlier. What about an excellent football player? Doesn't his brain work just as hard during a match as a physicist teaching quantum mechanics?
How about low IQ people? IQs below 80 or 70s? It's not like their brains are just slower or their memories shorter... Low IQ correlates with severe health disorders.
How about empathy? It is a form of intelligence, but despite the emotional IQ nonsense, you can't measure empathy -- you can see if it's lacking, which is another thing.
Anyway... My point is, intelligence might not be a single thing, and several of the various phenomena we lump under 'intelligence' are not measurable.