It may seem a simple question, but it matters a great deal whether the world is inside out. "Oh Dear," you say! "You can't be serious?" "Well yes, or is it no! I am not not serious," I reply, but "The question is definitely worth asking."
My reasoning is that if the universe, which means everything that we can observe, reminded that we cannot observe things that go out beyond our best guess at the age of the universe of something up to 18 or so billions of years, is inside out, this means we are observing just a phase rather than the whole. Well, we probably don't see much of the universe really because we keep assuming that light is moving, the speed of light variable, and we are relatively constant, rather than the other way around and so we get our numbers skewiff! What we may have is the faster-than-lightspeed-propagation-of-gravity.