Neurophilosophy, or the philosophy of neuroscience, is the interdisciplinary study of neuroscience and philosophy that explores the relevance of neuroscientific studies to the arguments traditionally categorized as philosophy of mind. The term was first coined by Patricia Churchland in her book, Neurophilosophy: Toward a Unified Science of the Mind–Brain, which was published in 1986 by the MIT Press. Churchland was driven by the mind-body problem, which asks a highly-debated question of how the mind, which drives intangible, nonphysical mental processes, is related to the brain, a physical organ. This problem extends to the understanding of other relatively unknown phenomena, such as decision making, learning, consciousness, existence of free will, as well as other related topics. Churchland originally theorized that the physical brain was clearly relevant and, more importantly, necessary to discovering the nonphysical mind and its related mental processes since the only thing that exists is the physical brain. These beliefs were initially met with contention from contemporary philosophers, who typically misinterpreted her argument. Instead of understanding her argument as "necessary," many philosophers often implied that Churchland argued that a neural underpinning was both "necessary" and "sufficient." This line of thought is not without historical context as many classical philosophers, such as Plato, Descartes, and Chalmers, argued that mind and brain have no connection. Contemporary philosophers often argue that the many undiscovered problems in neuroscience will never allow a mechanism into solving cognition. Churchland argues that proponents of this belief do not understand that the field of neuroscience is relatively young and is bound by the unknowns of chemistry and physics. The philosophy of neuroscience attempts to clarify neuroscientific methods and results using the conceptual rigor and methods of philosophy of science.