In his recent debate with William Lane Craig, Stephen Law presented his evil God challenge. Law had formally documented this challenge in a 2009 article in the academic journal Religious Studies. Here is the abstract:

Abstract: This paper develops a challenge to theism. The challenge is to explain why the hypothesis that there exists an omnipotent, omniscient and all-good god should be considered significantly more reasonable than the hypothesis that there exists an omnipotent, omniscient and all-evil god. Theists typically dismiss the evil-god hypothesis out of hand because of the problem of good – there is surely too much good in the world for it to be the creation of such a being. But then why doesn’t the problem of evil provide equally good grounds for dismissing belief in a good god? I develop this evil-god challenge in detail, anticipate several replies, and correct errors made in earlier discussions of the problem of good.

The article is available for free on the Religious Studies site here.