Extended mind thesis

In philosophy of mind, the extended mind thesis (EMT) says that the mind does not exclusively reside in the brain or even the body, but extends into the physical world. The EMT proposes that some objects in the external environment can be part of a cognitive process and in that way function as extensions of the mind itself. Examples of such objects are written calculations, a diary, or a PC; in general, it concerns objects that store information. The EMT considers the mind to encompass every level of cognition, including the physical level. The EMT was proposed by Andy Clark and David Chalmers in "The Extended Mind" (1998). They describe the idea as "active externalism, based on the active role of the environment in driving cognitive processes." For the matter of personal identity (and the philosophy of self), the EMT has the implication that some parts of a person's identity can be determined by their environment. TOC "The Extended Mind" by Andy Clark and David Chalmers (1998) is the paper that originally stated the EMT. Clark and Chalmers present the idea of active externalism (not to be confused with semantic externalism), in which objects within the environment function as a part of the mind. They argue that the separation between the mind, the body, and the environment is an unprincipled distinction. Because external objects play a significant role in aiding cognitive processes, the mind and the environment act as a "coupled system" that can be seen as a complete cognitive system of its own. In this manner, the mind is extended into the physical world. The main criterion that Clark and Chalmers list for classifying the use of external objects during cognitive tasks as a part of an extended cognitive system is that the external objects must function with the same purpose as the internal processes. Clark and Chalmers present a thought experiment to illustrate the environment's role in connection to the mind. The fictional characters Otto and Inga are both travelling to a museum simultaneously.