In the same way, posthumanism doesn't invalidate or dismiss humanism. Instead, it explores humanism. I'm reminded of the supra-disciplinary in Braidotti.

Rhetoric, too, is a supra-disciplinary field, to the extent that it's sometimes mistaken as not even having a 'subject' (re: the protest that you can't teach writing until students have enough of a subject to write about under their belts first).