re: #10 Bob Levin
This is real. Jews have a concept similar to prayer rugs, but no one would know about it. We’re supposed to pray in a space ‘4 amos X 4 amos’. It’s a square (obviously), about the size of a prayer rug, and we don’t do the full prostrate but once a year.
I’m sure that if someone could find a way to market invisible space, they would.
Oh and, wanna go into business selling that “invisible space”? I mean, that would be so cool, carrying around your own personal “daled amos” everywhere you go.
Oh wait…