[hosepipe]

[.. In your meaning of dimension, I wouldn't guess. In my meaning of dimension, a two dimensional (one of space and one of time) world would be a line, physics would be moot. ..]

So then, physics is a 3 dimensional attribute of 3 dimensional beings?..

[Alamo-Girl]

Actually, physics per se deals with matter and energy. Geometric physics focuses on the structure of physical "reality" regardless of dimensions.

My point about 2 dimensional reality is that physics would have little to say since it (1 spatial + 1 temporal dimension) would only be a line. Three dimensional reality (2 spatial + 1 temporal dimension) would be a plane, "flatland."

Note, in the book Flatland time is not a dimension - so two dimensional reality would be the plane, 1 dimension would be the line, the sphere is from the 3 dimensional world, etc.