>>18112886uh idk bros
If you can't observe it, how do you know it's the "4th" dimension? How does it relate to the previous 3 dimensions?
Meanwhile, "Motion" works well as a 4th dimension because it's a sequence of the 3D dimension. Just as you can do a 2D cross sections of a 3D volume, you could say 3D is a cross sections of a 4D volume (time).
A supernatural being would be able to observe your entire life story as a whole (past-present-future) in a single 4D frame. Such being could live in 5D, observing not just motion, but the alternative realities that could have been, depending on how the dices of quantum mechanics roll.
