[aposiopetic]

Primate Peter Carnley

So, on his view, he was for two weeks neither human nor primate, then for a span of years a human primate, and finally, at long last, a Primate.

[Protagoras]

So, on his view, he was for two weeks neither human nor primate,

Sounds to me like in his view "he" was nothing, because he didn't exist.