But here's the most incredible thing about it: the philosopher isn't proposing that as a concept; he's simply articulating what humans believe about themselves. That first they thing and therefore then they exist.What follows on from that is even worse: that since humans live that way, thinking that first they thing and then they exist, they also think that anything that doesn't think, also doesn't fully exist. Trees, the sea, the fish in the sea, the sun, the moon, a hill or a whole mountain range. None of that exists all the way; it exists on a second plane of existence, a lesser existence. Therefore, it deserves to be merchandise or food or background for humans and nothing more.