Abstract

According to Peter van Inwagen, there are no successful philosophical arguments for substantive conclusions. He argues for this thesis in two steps. First, he puts forward and defends a “criterion of philosophical success,” according to which a philosophical argument is a success just in case it has the power to convert any ideally rational agnostic to its conclusion. He then argues that, given the kind of disagreement we find among philosophers, we have good reason to think that no philosophical arguments for substantive conclusions satisfy that criterion. This paper contests van Inwagen’s case at both steps: first, it offers objections to his proposed criterion of philosophical success; second, it argues that even if we are wrong and his criterion is correct, the kind of disagreement that we find among actual philosophers does not provide a good reason to think that no philosophical arguments meet the relevant standard.