Discuss William Elder's answer to: Why does quantum foam produce virtual particles

Let's start QF with a correct understanding of what space really is.  Space is not merely a vacuum.  Space is a quantum field wherein gravity has a repulsive function and energy becomes either dark or light (that requires a discussion) which gives gravity an attractive force. 

This is no small discussion but let's look at some other work that I hope will clarify.

http://arxiv.org/abs/cond-mat/0404617