Why do we see the "down below" side of the physical world (e.g., the ground or the floor) at the bottom of our visual mental image (our visual perceptions)? Why not on the top of our mental imagery, for example?

But, are we even sure that the floor is at the bottom of our visual perception? Do we have even any reference that ensures us that the floor is at the bottom? Has our visual perception a bottom, to begin with? I guess NOT.

So what makes us think that the ground is at the bottom of our mental imagery?

I think this "top or bottom" thing of the visual perception is yet another Quale. So I guess we are back at the hard problem of consciousness again.

Note: I am not talking about cognition and evolutionary mechanisms that formed our cognitive 3D navigation mechanisms to register the ground as down below in order to be able to function consistently under gravity. I am talking about phenomenal consciousness.

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