What is a man? (And please read man or woman for man: I’m quoting texts where “man” is used to mean all humans.)
Democritus answered “Man is what we all know.”
Carlo Rovelli, the physicist, 2500 years later answers that far from being a silly answer Democritus foresaw what quantum physics would reveal.
“The nature of man,” writes Rovelli, “is not his internal structure but the network of personal, familial, and social interactions within which he exists. It is those which ‘make’ us, these which guard us. As humans, we are that which others know of us, that which we know of ourselves, and that which others know about our knowledge. We are complex nodes in a rich web of reciprocal information.”