What's certain is that your (Dale) conflating space and vacuum isn't
helping matters. I mean, I *agree* that vacuum implies space, in my
layperson understanding of the terms, but in fact I'll guess both words
have precise scientific meanings in physics, and those are what you need
to deal with, not your layperson's understanding of the words.
What is it with people pretending two related but different concepts are
the same by the simple expedient of putting one of them in parentheses
behind the other anyway ? Is it an item on the crackpot list ? Did
Backspace start a trend ?