Chris
It depends on what we mean by "rewinding" the tape. If we mean "rewinding"
the entire *universe*, with *absolute* precision, then, unless it is being
influenced by outside forces, it should replay exactly the same way.
Obviously, if even one neutrino is off by even the smallest amount, that
could ruin the whole thing, and the dominant species on Earth might now be
some kind of advanced dinosaur, or there might not even *be* an Earth, or
even the Solar System.