[duckmysick]

> For example, playing tennis. It’s easy to identify a good tennis player even if you can’t play tennis at all.

I'm not so sure. Identifying good talent is difficult when it comes to sports. There's an entire industry of scouts that try to find decent players ahead of the others. More so, they are tasked with finding out why a particular players is good. It's anything but trivial.

[xanderlewis]

I’m just demonstrating that the two categories are different, which they clearly are.

Not that one is trivial and the other is impossible. Of course, if you want to do any task well it becomes nontrivial.