Ok, teach...... tell me about how a prop-powered space ship
works.....

I said nothing whatsoever about a prop-powered space ship. you did.

I did say that "action/reaction" -- as in either a rocket ship OR of a boat
prop -- means that neither "pushes" against anything at all. Than means that
thrust comes from the action/reaction of the prop and water NOT action of the
prop and reaction of the hull.

dumb, you are.