 Anyone who denies the Umbrella View and who has an answer to the SCQ can consider that as a partial answer to the Extension Question. What objects are there? Contact says that there are the xs, and for any xs that are in contact, there’s another object (the one that’s composed of them). Life says that there are the xs, and for any xs that are caught up in a life, there’s another object (the one that’s composed of them). Mereological Nihilism says that there are just the xs, and no other objects. Mereological Universalism says that there are the xs, for any xs at all (no matter how they are arranged), there’s another object (the one that’s composed of them). And so on for other answers.