The subtraction argument aims to show that there is an empty world, in the sense of a possible world with no concrete objects. The argument has been endorsed by several philosophers. I show that there are currently two versions of the argument around, and that only one of them is valid. I then sketch the main problem for the valid version of the argument.

In this dissertation I suggest an answer to the famous question ‘why is there something rather than nothing?’ I argue that there is something because there could not have been nothing. The focus of my discussion is the empty possible world of metaphysical nihilism, and the first chapter is a rejection of the only prominent argument for that position; the subtraction argument. In the second part of my discussion I construct a positive argument against metaphysical nihilism, I assume, as is (...) common in the literature, that inconceivability provides evidence of impossibility. I establish the inconceivability of nothingness taking propositional imagining to be the core of conceivability, claiming that we have no experience of nothingness in the relevant sense and are unable to imagine it. Finally, I suggest that a distinction should be made between everyday use of the term ‘nothing’, and the sense under discussion here. The inconceivability of nothingness applies only in the latter case. Given that nothingness is inconceivable, we have prima facie reason to suppose that the empty world is impossible. I conclude that given the failure of the subtraction argument and in light of my argument against metaphysical nihilism, that position should be rejected. (shrink)

This thesis was on how God is related to the truth-values of propositions on possible worlds - specifically, those propositions that do not seem to be about Him and constitute His ideas for what to create. It opened with a survey of some historical positions with special emphasis on Aquinas, Leibniz, Spinoza and Kant. Next, some criticisms were given for these so-called deity theories with the most space given to Brian Leftow’s critiques. The second chapter detailed Brian Leftow’s theological modality. (...) In it, secular modality is excogitated in an instant from eternity when God gets a set of creaturely natures in one imaginative act. His preferences that are based on His nature then determine the modality of what God thinks up. A number of objections were raised for the Leftowian project and the last chapter attempted to supplement an older deity theory with some insights from Leftow in order to avoid his initial criticisms. (shrink)