Hey guys, i am not a science guy by any means so any answer written for the layman would be much appreciated. i may not be understanding this right but here it goes: In einstein's relativity of simultaneity we talk about how events A,B, and C are simultaneous for one observer (lets call him O1). For another observer A comes first then B then C (O2). For another it goes C, B, A.(lets call him O3). For O2 C is in the past of B, for O3 A is in the past of B. They cant both be in the past of B can they? Maybe I am not understanding this correctly.