Extending the Extended Mind: From Cognition to Consciousness

Where does conscious experience stop and the rest of the world begin? Is the material basis of consciousness confined to the brain, or can it be extended to include other parts of the body and environmental elements? This study proposes an extended account: when all the requirements are fulfilled, an external tool may become part of the realising basis for certain experiential processes. Andy Clark and David Chalmers argued famously that the material basis of cognitive states sometimes extends out of the barriers of skin and skull to external objects such as notebooks and other everyday tools. However, they draw the line there: only cognition, but not consciousness can have an extended base. The central argument of this study is that their constraint is not legitimate. If one is accepted, the other one follows.

The first chapter lays an overview of the theoretical background of externalism and the 4E-theories in present-day philosophy of mind and cognitive sciences. It also examines the central concepts, accounts and methodological questions that will be used and further developed in later chapters. The second chapter presents three arguments for the position defended in this thesis, namely the hypothesis of extended conscious mind. The third chapter analyses the ongoing debate in the interface of philosophy of mind and philosophy of science about the causal–constitution distinction, and argues that rather than in mechanist terms, the causal–constitution distinction should be interpreted in diachronic terms when dealing with mental phenomena. When depicted that way, the extension relation in the hypothesis of extended conscious mind counts as constitutive.

The fourth chapter distinguishes between several different levels of extension, from mere short-term extension to more robust functional incorporation, where the external tool has become part of the transparent bodily point of view of the subject. Based on the notion of functional incorporation, a set of demarcation criteria for the hypothesis of extended conscious mind will be developed. The chapter closes by discussing sensory substitution as a concrete example of functional incorporation. Finally, the fifth chapter introduces the most influential counter-arguments that have been set forth against the hypothesis of extended conscious mind. The critiques will be examined and answered.