>>13973821>Nothing is defined by an opposite. All you've done is put off the job to a different word. Alright, now define "up" without using concepts of "gravity" or "down".Imagine you're an orb in the sky and you rotate. You have the blue sky, and the green earth. While spinning, you will notice shifts from green to blue. Once you're at the maximum distance from the shifting point, which you have inferred because you spin at constant speed and you're able to count time, you call this up if what you see is blue, and otherwise, you call it green.
