As a non-Parisian: the hard distinction between "metro" and "train" can be non-obvious, even perplexing, depending on which train systems one is accustomed with. Some systems just don't have it, in manners that if said in Paris terms it might be train to Lyon arriving next to Line 6 Westbound.
It doesn't need to be a hard distinction. I'm sure everyone can see the difference of a building with multiple platforms and usually shops and other things targetting non-locally-resident travellers and your average metro stop with has two platforms (one for each direction) and not much more than an entrance and exit. Where exactly you draw the line doesn't really matter.
That. That kind of distinction isn't universal. Some places just have a fused metro-plus-train system, in which you can slip in a $1 metro ticket, ride along changing metro trains for over a day across >1500km/1000mi, and pay outstanding fee at the exit, like on Japanese JR networks and metro trains interoperating with it.
I'm not saying which modes of thinking are more rational or superior or anything of that sort, just that the seemingly instinctive distinction you have described is not necessarily so to everybody.
>As a non-Parisian: the hard distinction between "metro" and "train" can be non-obvious
Do you know the difference between "train" and "subway", because "the metro" is just a subway, just like in NYC or commonly found elsewhere in almost any large city.
Yeah, as a piece of knowledge, and what I've been saying is it's European thing.
I can hop onto Tokaido Main southbound at Tokyo with $1 ticket and get off at same Tokaido Main platform at Kyoto, or vice versa, or same for Ueno to snowy Aomori through Tohoku Main, if I didn't mind paying $60 outstanding fee and a 12-hour 5 train change long "metro" experience and "oh come on" look at the gate. By all definitions the Tokaido or Tohoku line are a "metro" rail, and uses some of same models of rolling stocks(cars) as literal subway services. I can technically do that because there's no hard distinctions between metro and train in the system I'm familiar with but the rails are rails and rails go everywhere.
European cities tend not to have that, and instead have often Y shaped branches off international long-distance rail networks that comes in and backs out of a "City Central" station, where it connects to local train services like trams and subways. This is due to Europe long having concept of city boundaries where city-ness of cities roll off sharp and somewhat abruptly ends, and many cities have not expanded enough to fuse together like late-game Civ maps.
Yes, I am aware, what I'm saying is that not everyone knows and you have to say it. You can't say, like, the author's stupid to not be aware of obvious distinction.
Train has a train station (with paid toilets now unfortunately in France) and connects to other parts of the country. Metro is a subway and is within city boundaries
