As terrible as these discussions are, they are even more terrible on the expert forum because those people should know better. Everyone has their own definition of basic terms and don't even realize they're not arguing about the same thing. If this theory was settled science there wouldn't still be this much discussion about it. I thought I only didn't understand how relativity defines the cause of the twin paradox until I saw relativity's definition of time and then I realized this theory is a waste of my time. I don't possibly see any way all the contradictions of that definition could ever be explained away. I'm out.
P.S. Mass is both matter and energy where rest mass is matter (which doesn't increase as it approaches c and can only be converted into energy (also mass) in discrete quanta) and where massless particles both have mass (energy) and don't have mass because they don't ineract with the Higgs field but do interact with gravitational fields but not because of their mass. Makes perfect sense in relativity land. Even if this theory isn't a logical disgrace, the teaching of it must be.
Edited by ralfcis, 30 January 2019 - 08:25 PM.