What if what we see out all airplane windows is fake? Projected? Simulated? What if we never actually ‘fly’ but just wait while we are beamed to our next location? Or the next location is loaded into our brains (a la, The Matrix) and the plane is just a holding mechanism? Can you be sure you are traveling? How?
Can you see out one window into another? You can’t. You have no way of knowing what reality is. You simply ‘trust’ it.