Human beings can have “strongly certain” beliefs—indubitable, veridical beliefs with a unique phenomenology—about necessarily true propositions like 2+2=4. On the plausible assumption that mathematical entities are platonic abstracta, naturalist theories fail to provide an adequate causal explanation for such beliefs because they cannot show how the propositional content of the causally inert abstracta can figure in a chain of physical causes. Theories which explain such beliefs as “corresponding” to the abstracta, but without any causal relationship, entail impossibilities. God, or a (...) very god-like being, provides the best causal explanation for such beliefs. (shrink)