[lostconfused]

You can train a skill and improve on it. You can't train your head shape or arm length nearly as much. The brain is more malleable than some of the other body parts.

[chrisseaton]

I'm not sure what you're suggesting then - we should train all pilots to be uniformly brilliant at everything so there's no variation and we can use any pilot to test, before we test any more aircraft?

[stan_rogers]

No, it would be about making things safe/usable for the merely competent and not relying on "brilliance".