OK...I actually almost FELT a relay clacking in place in my brain. It's a really weird sensation.

I got the grid of cubes within a cube, remove the cubes, left with grid thing.

That's like why I can extrapolate the ball on the trampoline into 3D instead of just the 2D trampoline (which, yeah, the fact the trampoline is pitting I guess forces it into 3D already...but you know what I mean.)

This is the point where the "flat" universe seems to click in place like a Leggo in my head...but then, replacing it with non-flat shapes shatters the near comprehension.

A grid of doughnuts? Spheres? No, doesn't makes sense. I must have it wrong.

Fraser (sp?) mentioned in yesterday's podcast that our intuition is left on the Savannah, it won't serve us here...and I'm afraid that's my sticking point. I just can't intuit a non-flat grid that uniform and universal.

I mean, I can picture that 3D grid as if there's a finite mass in it pinching the lines...but it stops at some point. And a "flat" grid in that cube is easy ti imagine as stopping at the edges of the outer cube or going on forever, but any way in which the grid lines curve, has to end, and, be finite as you can't have (in my tiny mind) a 3D grid of curving lines without mass chaos in the lines.

*sigh*

Thanks anyway.