 Naturalism  is a movement that seeks to ground philosophical theorizing in the scientific enterprise. As so often in philosophy, different authors use the term “naturalism” in different ways. Usage within philosophy of mind typically connotes an effort to depict mental states and processes as denizens of the physical world, with no irreducibly mental entities or properties allowed. In the modern era, philosophers have often recruited LOTH to advance naturalism. Indeed, LOTH’s supposed contribution to naturalism is frequently cited as a significant consideration in its favor. One example is Fodor’s use of CCTM+FSC to explain semantic coherence. The other main example turns upon the problem of intentionality.