Answer the following question given this paragraph: 

28.2 Simultaneity And Time Dilation • Two events are defined to be simultaneous if an observer measures them as occurring at the same time. They are not necessarily simultaneous to all observers—simultaneity is not absolute. • Time dilation is the phenomenon of time passing slower for an observer who is moving relative to another observer. • Observers moving at a relative velocity v do not measure the same elapsed time for an event. Proper time Δt 0 is the time measured by an observer at rest relative to the event being observed. Proper time is related to the time by an Earth-bound observer by the equation.


Q: Two events are defined to be simultaneous if an observer measures them as occurring at what?


A:
same time