Comment by ereiamjh

A lot of things are like that though. There's a cartoon - I thought XKCD but I can't find it - about how a beginner might identify an oak leaf by a set of descriptions - but an experienced arboriculturist would just say "well, you know, it's an oaky shape".

Like, I can tell a crow from a blackbird. Could I explain to you how to tell a crow from a blackbird? Absolutely not.