Applied in the same way, statement 2 is the claim that physicalism is true at a possible world "w" if and only if any world that is a physical duplicate of "w" (without any further changes), is duplicate of "w" without qualification. This allows a world in which there are only physical properties to be counted as one at which physicalism is true, since worlds in which there is some extra stuff are "not" "minimal" physical duplicates of such a world, nor are they minimal physical duplicates of worlds that contain some non-physical properties that are metaphysically necessitated by the physical.