10.4225/03/562EF79E83DA7 Graham Oppy Graham Oppy Cosmological Arguments Monash University 2015 cosmological argument first cause God Aquinas Leibniz William Lane Craig Kalam cosmological argument infinite regress contingency axiom of choice Philosophy 2015-10-27 04:03:40 Journal contribution https://bridges.monash.edu/articles/journal_contribution/Cosmological_Arguments/2004330 Final Published Version: Nous 43, 1, 2009, 31-48