::So don't mention him. Also note that Plantinga isn't positively showing the failure of the logical argument, he's arguing that it's possible that it's not within an omnipotent God’s power to create a world containing moral good but no moral evil, and that all so-called ‘natural evil’ is brought about by, say, the devious activities of Satan and his cohorts. A terribly frail omnipotent deity, but that's the argument. . ,