 Here, again, we can also obtain related results about individual supervenience. Mark Moyer (2008) argues that weak and strong individual supervenience are equivalent in the special case of intrinsic properties. He appeals to a recombination principle similar to Paull and Sider’s principle of isolation, but with a twist. The intuitive idea is that any two things in any two worlds can be isolated from their surroundings and then put into a world with each other. More formally: