No Preferred Frames in Relativity

[Alan Grayson]

Not that I want to get into a pissing match with a de-facto self-declared mind-reader, but it should be noted that Clark is mistaken in his concept of no preferred frames in Relativity. It doesn't mean all frames are equally valid. If that were the case, the Twin Paradox would indeed be a paradox, at least in SR, since each twin will see his other as younger than himself when they meet. "No preferred frames" just means there is no unique frame in which the SoL in a vacuum has an invariant speed of c. Concerning the experts in Relativity, I have no disrespect for their knowledge, but they have ignored the issue I've raised about the EP which doesn't falsify Relativity. AG