The primary aim of my dissertation is to set out one important role that cognitive science can play in debates in metaphysics. The focus of my dissertation is the appeal to intuitions in metaphysics. In certain metaphysical disputes, we often see common sense or folk intuitions being invoked in evaluating competing metaphysical theories. But when metaphysical theories are charged with violating common sense or folk intuitions, the charges tend to be met by claiming that the target theory is not, after all, at odds with what the folk think on the matter. As a result, we often end up with conflicting claims about what the folk think. Here is one of the key ways that I see cognitive science contributing to metaphysics: Cognitive science can...