My house may only be one place, but it's still "the premises", not "the premise".

"Content" as a mass noun is a very recent phenomenon.

My first reaction was that I agreed with yello.cape.cod's conclusion but not their argument. After all, "Someone else", like "attorney general", is a noun (well, pronoun, but close enough) plus a trailing adjective, so gee, why aren't the two constructions the same?

Oh. Right: "Someone else's" is a possessive. "Attorneys general" is a plural. Never mind.