Look "human" and "person" are not necessarily the same thing. They're willing to admit they're biologically human. Mostly. Unless the serum made them something else. Still not a person. Not quite.

"By using their words, mostly, I think. Or else they don't have a lot of joy," Soldat allows. There's definitely some people without much joy. (We might not have that much, ourselves. Just right now it's hard to hold still. Hell, not even sure you know what joy feels like.) "I haven't met a lot of people with joy to share," they admit, turning her back up against his side and wrapping an arm around her waist to show her a side-by-side step.