I was looking at the page, but shouldn't the two axises be relabeled?

I think I understand what you mean, but the whole idea is that the x-axis represents something's "human-ness," with "not a person" to the far left and "a person" on the far right. Familiarity in this case means "people like it," and the traced line indicates how much people like/dislike the thing as it progresses from "not a person" to "a person."
 
I dunno if this is really the best response, but I saw that nobody replied to this and figured you deserve at least some explanation.

yeah its a poor choice of words to describe the two axis.
 
as you move outward on the x axis the object becomes more and more human unti you have an actual human at 100 (han solo or whatever). So at 0 you can have anything, a mug, dirt, whatever, and you have no empathy for it, or as the chart would say, you have no familiarity with it. As you move further and further up as objects become more human, for the most part your relation to them increases linearly, or even exponentially. For every extra human characteristic you add the object becomes more human, to a point. At that point, or range, suddenly we stop focusing on th e characteristics that make him/her/it human, and start focusing on the characteristics that make them not human, which can often be unpleasant (or at least I'd imagine being dead is unpleasant). 
 
But again, its a poor choice of words. You could swab the two descriptions and it would still make sense. The X axis is meant to represent the characteristics that make people people. I don't want to go all psychological on you but a thought process, free will, 2 hands 2 feet, etc. If you create an object with ~70% of those features, rather than focus on the fact that this thing /him /her has 2 feet, 2 hands, a head, and a free will, we focus on the fact that it doesnt have a proper face or whatever.
 
ps: OP nice rack.

" I was looking at the page, but shouldn't the two axises be relabeled? "