“That’s not ambient.”
“No, it’s not. It’s ambient music.”
“But it’s not ambient.”
“Yeah, ambient is an adjective here, not a category, more a tag. It’s not ambient. It’s ambient music. Music with an ambient quality.”
“So, it’s not ambient music. It’s ambient music.”
“Yeah.”
Similarly, “fine art photography” sometimes means “photography that is also fine art” and sometimes means a very specific genre that if I ran the zoo would be called “neo-pictorialism”, and that you’re not likely to see at MOMA:
https://flickr.com/groups/[email protected]/