A duplicate created as a result of time travel. When one object travels to
another time where that same object also exists, then two of the exact same object occupy the same time. The popular theory is that one of the paradox duplicates is doomed to
destruction as a result of the universe attempting to correct this violation of
the reality matrix of existence. More pressing is the belief that, were the duplicates to come in contact with one another, it would violate the very basic law of physics that 'no two objects can occupy the same space at the same time', and, thus, unmake the universe.