I read Benedict's statement "inferring from the context" (which is quoted) to mean that simply a magazine about camping (which is the context) "inferred" that t

I read Benedict's statement "inferring from the context" (which is quoted) to mean that simply a magazine about camping (which is the context) "inferred" that the people reading it were people who liked camping. And while that would be a fine and benign thing, it wasn't the "inferring" the advertisers were doing back in the day. Back when I did freelance writing for magazines there was a book that was published annually called "The Writers Guide" which published the demographic information for the readers of various periodicals. That was developed from surveys, not from context. It helped writers like me to understand what the editor would consider appropriate for their readership.