> I’ve actually expressed the problem in an ambiguous way.
> Did I mean 2 unique pages per day or overall?
The author needs a course in logic. "They visited at least two unique pages." is not ambiguous. Visiting page A on day 1 and visiting page B on day 2 makes the sentence true.
> Did I mean 2 unique pages per day or overall?
The author needs a course in logic. "They visited at least two unique pages." is not ambiguous. Visiting page A on day 1 and visiting page B on day 2 makes the sentence true.