Penrose just won the nobel prize (Physics).
His view is that sentient AI isn't possible, which is why I post the video here
Penrose has made several forays into AI and consciousness over his long career.
A particularly annoying early one (for me, personally) was his notion of "quantum consciousness".
That idea was nicely demolished by physicist Max Tegmark, who reminded Penrose that thermal noise
would destroy entangled states of large group of particles: the brain is "wet, warm and noisy."
Tegmark, Max, "The importance of quantum decoherence in brain processes, Physics Review, E61:4194–4206, 2000.
It was personally annoying because I have been interested in the physical process involved with
(actin) microtubules in neurons, and particularly that positive charges can be made to travel along
the insides of the microtubules via the Grotthuss Mechanism. ( Water, when confined to extremely
small regions, doesn't behave like water in the wild, as it were).
https://en.wikipedia.org/wiki/Grotthuss_mechanism
Every time I try to find out more, I eventually hit a wall because it's assumed that "quantum consciousness"
is an end goal. I have no interest in that kind of Wu.
All I want are physical properties of the tubules, e.g. internal diameters, how long the actin structures
last or, I should say, be made to last, because they can disassemble very quickly where they are not needed.
The size of the tubules makes it difficult to observe them in detail. Standard "brain-slicing" techniques
are too crude and end up pulverising the tiny beasties.
I know that the positive charge can move very rapidly, approx 10^{-12} secs per jump from H2O to hydronium
ion... (That includes many other factors, e.g. the "drag" of negative ions in the opposite direction, etc.)
I also know that the tubules themselves are very symmetric, that the moving positive charges inside multiple
tubules can induce effects similar to those seen in double (or multiple slit) experiments.
I was encouraged that Penrose mentioned microtubules (in a sentence or two) right at the end of
a post-Nobel interview a few weeks ago. Sadly there was no time to discuss his ideas further in that
interview.
In any case, my endeavours arose out of a suspicion that evolution would take advantage of those fast
"water-wires" in some way. Maybe that's why I'm finding it difficult going - personal incredulity is not
always the best basis for a hypothesis.
![Smile :) :)](/data/assets/smilies/smile.gif)