 analytic/synthetic distinction |  cognitivism vs. non-cognitivism, moral |  functionalism |  grounding, metaphysical |  Lewis, David: metaphysics |  logical truth |  metaethics |  modality: varieties of |  moral anti-realism |  moral non-naturalism |  moral realism |  multiple realizability |  naturalism: moral |  reduction, scientific |  supervenience 