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re: time travel



Hi James,
You wrote:
 If I were to specify at time a, Alice(a)  and Alice(b) both existed, Alice(t) having the memory of time (b) and supposing herself to have traveled back from it. Time b is later. It only has Alice(b) about to time travel (or not, possibly). She is Alice(a), but later. Time c (a later time) has Alice(c), who is identical to Alice(a), and Alice(t*) who is identical to Alice(t). Unless you wish to propose a non-relationist time, a and c are the same time. I think I need diagrams here
 
 
I must confess that I am totally confused with respect to what your points are re above.May I suggest that you first specify your Time A which is your  temporal location and , yes, please use diagrams to clarify your points.
Do that after having a wonderful holiday of the New Year.
Stanley