 Assessing the significance of disagreement over religious belief is very different from assessing the significance of disagreement in domains where there are clearer, shared understandings of methodology and evidence. For example, if two equally proficient detectives examine the same evidence that Smith murdered Jones, their disagreement should (other things being equal) lead us to modify confidence that Smith is guilty, for the detectives may be presumed to use the same evidence and methods of investigation. But in assessing the disagreements among philosophers over (for example) the coherence and plausibility of theism, philosophers today often rely on different methodologies (phenomenology, empiricism, conceptual or linguistic analysis, structural theory, post-structuralism, psychoanalysis, and so on). But what if a person accepts a given religion as reasonable and yet acknowledges that equally reasonable, mature, responsible inquirers adopt a different religion incompatible with her own and they all share a similar philosophical methodology? This situation is not an abstract thought experiment. In Christian-Muslim dialogue, philosophers often share a common philosophical inheritance from Plato, Aristotle, Plotinus, and a broad range of shared views about the perfection of God/Allah.