앞에서 절대적인 것은 없다 라고 하셨는데... mach 도 그렇고 다른 과학자들 (뉴튼의 절대시간 반대한) 도 그렇지만 다들 somehow presupposing the absolute time whenever they have to campare two events that are happened in different locations as they try to link them together through the concept of happened "at the same time." Rachel...