That sounds like what a show off at a middle class chatterati dinner party should know about.
You can be well educated in different ways. Knowing maths, science, economics, politics, history etc are all more useful IMO than those arts.
You do come across from time to time either someone you work with or an annoying uncle etc who appears to know 'everything about everything', invariably they don't know as much as they reckon, but they like to take advantage of the fact that you don't know much about the subject either so can blag a bit. Arts bores are especially annoying, no offence to people who enjoy the arts, but I do find it very pretentious.