[adrianN]

Are you implying that every human can do everything equally well? Talent is a thing. I wouldn't beat Usain Bolt no matter how much I trained.

[undersuit]

No, but I'm not implying that you can't train up to the 95% percentile. Not every dog can be Balthazar[1], but almost every single dog can be trained to sit. Not every human can be Albert Einstein, but almost every single one of them can learn Calculus.

[1]http://metro.co.uk/2017/04/23/britains-biggest-dog-is-7ft-an...