I'm talking about spatial intelligence and not the difference between Aristotelian and Boolean logic. Obviously I have no idea what it feels like to stack shorter than a pancake (i.e., existing in 2 dimensions). Pedantry aside, the difference between existence and experience seems obvious.

I've never seen a human fly and well over 99% of my work is performed in the x and y axis. When communicating directions, I'm rarely concerned about z. Simple graphing tools (e.g., paper and pen) can be used to illustrate my point further.