Collins' core fine-tuning argument

Collins (The Blackwell companion to natural theology, 2009) presents an argument he calls the core fine-tuning argument . In this paper, I show that Collins argument is flawed in at least two ways. First, the structure, depending on likelihoods, fails to establish anything about the posterior probability of God s existence given fine-tuning. As an argument for God s existence, this is a serious failing. Second, his analysis of what is appropriately restricted background knowledge, combined with the credences of a specially chosen alien , do not allow him to establish the premise (Formula presented.).