Recent content by mmoroz

Ahh, that's right. Why didn't I think about it? Somehow, I was sure that time travel only presents a paradox if there's free will. The idea of an automatic device that exploits the time travel to create a paradox is so obvious, in retrospect. Sounds like the Polchinski paradox is similar to...

I don't think either of these is a problem if laws are deterministic. The critical point is that deterministic laws forbid any free will. Whether or not you punch / kill / send a signal is not something you can decide on the spur of the moment. These actions are fully predetermined by the full...

An important part of SR is explaining which events may cause other events (e.g., a signal cannot get from A to B when they are space-like separated). Moreover, I vaguely remember that at least some minor arguments in relativity actually rely on the assumption that causality must not be...