We thus require a definition of simultaneity such … he can decide by experiment whether or not … [For example, if at the midpoint between A and B,] If the observer perceives the two flashes … [p. 30] But the events A and B also … [A person at the midpoint of A and B on the train] is hastening towards the beam of light … A. Hence the observer will see the beam … Events which are simultaneous with reference to the …
Google-1
Google-2
Copyright clearance needed for quotation.