Ok, but you are saying 'Kilroy was here' was an 'early' meme dating back to the 1940s. By the 'thing described by a term can predate the term' logically, memes have always been a thing and you won't be able to cite an 'early' meme credibly.

The guy was agreeing that 'sure, that was a meme, but so too were many many things throughout history, basically life is a constant barrage of 'memes' in that sense.