the red doesnt just represent "bob"...its all of that time-line. Bob just exists on it.
I suppose it could stop at the point where the traveller left, but it MUST exist up to the point when the traveller left the present and returned to the past. If the line stopped at the point when "bob" was removed the traveller may not have been able to exist at all, creating the blue line (representing infinite possibilites) and therefore has no loop returning to the point of "bob"
Also, the stopping point on the red line (when the traveller left) could also spring forth another slew of blue line of universes.
So my picture is incomplete.
|