"With age and experience, we learn that common sense is not so common."

I totally agree with that even though I might not have reached avatar-age to gimme any bragging rights yet

Yes, "out of the air" if one believes the air is empty or that we've known exactly what's in everything and I know nothing about these things but it seems common sense to me that the "nothing" is filled with something and that that something may be used in some way

But it's interesting...

Danny