Other physicists, however, believe the entropy burden is merely shifed to the space-time curvature in an as yet unquantified way. This is the most popular objection to time travel. Dr. Fechner goes back in time and shoots his grandfather. I think a lot of the confusion comes from an outdated perspective on time. The modern physicist has a much different view.
Objects move in space as they move in time.
In some sense, time simply exists. There is no universal past to which one can travel. In fact, relativity has no implications regarding determinism vs. uncertainty. In this theory there is no universal present, and the entire past and futue of the universe are regarded as existing as an indivisible whole. Any conflict is, in fact, illusory.