Did this sculpture exist before the sculptor chiseled it out of the marble block? Every single particle that it's made of was already in the same place that it is now so it must have existed. Or if you say that it did not exist - in that case it was brought into existence without changing it in any way, since only the marble that wasn't a part of the sculpture was chiseled away. Does it mean that two objects can be completely identical but one of them exists and the other one does not?