If you are really serious about this question then you would also consider what mathematicians have to say about "space". Unfortunately, this is pretty much the whole of mathematics, but I think special attention should be given to the duality between geometry and algebra. This stuff goes back to Descarte. For example, you can consider the points equidistant from a specific point, which gives a circle. Or you can consider the algebraic expression X^2+Y^2=1. Both of these viewpoints are in a sense, two sides of the same coin. What is that coin? Deep answers can be found when you start doing funky things like change your definition of numbers, to say, a finite field. Even just having two numbers 0 and 1 is quite interesting to consider. What is the corresponding geometry? Or, more confusing still, let's drop the requirement that xy = yx (commutativity). Now what are the non-commutative geometries on the other side of the coin?
Considering the wide variety of these apparently fanciful ideas that have made their way into theoretical physics fills me with wonder. I wonder if the authors of the article mention any of this stuff in their book.
Considering the wide variety of these apparently fanciful ideas that have made their way into theoretical physics fills me with wonder. I wonder if the authors of the article mention any of this stuff in their book.