Actual Infinity in Reality?

[polymath257]

Steve,

If space is, as you claim, something that is finite, how is the Unierse expanding?  If it is expanding, then how is its volume increasing?

It seems that the fabric of space is expanding--like a loaf of raisin bread being cooked. Raisins are the galaxies and the space between them expands while it is being baked. Raisins move in the dough even as the dough is expanding. Everything is getting further apart but not from a center. 

Expanding means the volume is increasing so I don't understand your last sentence.

And in a flat spacetime, which is what seems to be the case, space is infinite in extent.

And yes, it is the case that expansion can happen with finite space. You are correct here.