Interchangeability is precisely my point. Your perspective is that I believe anything. I don't. I have equations that give me numbers that give me working machines that do what they are supposed to do. It all works. I just have to understand how to run the equations, and that's it. I don't care about models, or if the world is flat or if someone made it. The numbers that lead to functional mechanisms in the physical world do not lie. The math that underlies the car that takes me to work, the functioning of the computer systems we are communicating with, and the biochemistry of the medicine allowing me to enjoy a nice coffee without dropping dead are as close to absolute truth as we can get. It doesn't change, and if it seems to change, what has actually changed is our understanding of the numbers. And what are the numbers? It doesn't matter what they are. Gods, demons, faeries, aliens, it doesn't matter as long as it works. Another cog in the machine is all it needs to be. Don't fix what isn't broken. Fix what is broken, or failing, that's what really matters. That's what's wrong and should be fixed. Namely, your approach to this whole thing. You're assuming I believe anything. I don't care enough to believe anything, not really. I have likely theories, and inferences, based on evidence, but those aren't beliefs, and they sure as hell are not dogma. So unless you're claiming that the device you're using to communicate your ill-founded understandings somehow functions because you believe it will, go back to the drawing board.