dhw: We discussed Penrose’s ideas on the thread with the horribly misleading title “Human Consciousness: Penrose: soul survives!”
I couldn't get onto this site as it was heavily in demand. That's good to hear! I'll try again later.

DAVID: I copied the whole story. Here is the Penrose video:

https://youtu.be/lJmzfdF4CZk

Many thanks, David. I'm afraid I didn't get much out of it beyond the fact that consciousness is a mysterious "extra", and maybe microtubules and quantum mechanics might just possibly somehow but so far inexplicably hold the key to what it is.