deduced. For those who do not perceive its rationality, even universal consent could not prove it.”[2] We want to assess Lewis’s argument for objective morality, particularly to determine whether he makes a convincing case that it is fully rational to be committed to it. We will do so by examining two clear statements of his argument. Here is the first. In order to avoid misunderstanding, I may add that though I myself am a theist, and indeed a Christian, I am not here attempting any indirect argument