Hard to tell, isn't it? Not without projecting personal thoughts and philosophies! That's why—

[ Speaking of interesting and the dubious use of that term: by entertaining the conversation this way Miller is turning out to be one of the more interesting respondents. ]

I'd like to test exactly what their threshold is for remaining so impassive and removed.

[...or simply "are they even human" but it's not a thought he puts out there.]