Yep. You might also have a postulate that empty is a Casimir observer effect with a 4D confluence of related manifolds, with a Gaussian distribution of pirates. Having a postulate is great - but then it has to mean something.
Empty space is usually transparent, yes.
No. "Observer effect" does not mean what you think it means. If it did, then water might be less or more transparent, and that transparency would be altered through the effect the observer had on it. That is not true at any of the scales we are talking about.
No, space full of water is not empty, by definition.
I do - you are just wrong. You have this odd belief that if you post the same incorrect theories 80 times they will become more true. They won't. Nor will they become more correct if you explain the same incorrect theories over and over.