Thread:MiniDaggers/@comment-32808735-20171014234559/@comment-4010415-20171014235424

He means "first trivia" as in "This is the first time this has happened". That kind of trivia can stack up really fast and clog up the trivia sections, since there's a first time for every single thing. So, we don't include that kind of trivia, just to keep the pages from getting clogged up.