[Merge]

Quote by: Halofan48 Well, if light is matter, which according to some statements it is, then any part of space where light can be seen coming from a star or other source, then light is at that point, therefore matter is also at that point?

Ah. I thought you had a problem with empty space as a concept, not as an actual possibility. I would agree that this sounds right, though it wouldn't be hard to imagine a place that no light reaches. But even if this were the case, you can always rely on other wave particles (and background radiation, right?).

Quote by: Tycoon Halo's trying to say that light will eventually reach all points in space. So, all space will eventually be occupied by something, if only just light. One of my arguments was that if there were empty space then a cubic inch wouldn't exist because there would be nothing for it to define. But then we came to the conclusion that it would still be a cubic inch because of the possibility that matter might eventually exist there.

Thanks for clarifying Halo's post. I agree with you that throwing "possibility" into the definition solves your problem for space without matter occupying it.