"FTL means leaving the causality light cone, conventional notions of causality, and therefore all of physics:" While I agree with your conclusion that ftl is e

"FTL means leaving the causality light cone, conventional notions of causality, and therefore all of physics:" While I agree with your conclusion that ftl is equivalent of time travel and breaks causality I think its incorrect to say it breaks all of physics. There are several solutions to general relativity that are valid. http://en.wikipedia.org/wiki/Chronology_protection_conjecture http://en.wikipedia.org/wiki/Chronology_protection_conjectur...