by Carl Pierer
Andy Clark and David Chalmers present a thesis of extended cognition and extended mind in their seminal 1998 paper: “The extended mind”. In it, they attack the idea that cognition and mind should be confined to the boundaries of our skull. Instead, they suggest, that the tools and instruments used in cognitive processes are part of the cognitive process. Clark and Chalmers support this claim by the following consideration. Suppose, Wolfram is seated before a computer screen and asked to play Tetris. He has to decide whether certain shapes that keep appearing on the top of the screen will fit into slots at the bottom of the screen. There are three scenarios:
1) Wolfram rotates the shapes mentally to decide whether they fit or not.
2) Wolfram presses a button to rotate the shape on the screen and then compares the shape to the slot.
3) Wolfram lives in the not-so-far future and has a neural implant which allows him to rotate the shape physically in his head. He can either use the neural implant to decide whether the shape will fit or use the initial method in 1). (See Clark & Chalmers 1998)
Clark and Chalmers think that in 3) it does not matter whether Wolfram uses the implant or the mental rotation, either way deciding whether the shape will fit counts as a cognitive process. To meet obvious objections, it can be supposed that the neural implant works exactly like the computer in 2). But if it is the case that the neural implant in 3) is functionally just like the computer in 2), there is no difference between 3) and 2). Neither is there a difference between 1) and 3). But then, if 1) is like 3) and 3) is like 2), 1) must be like 2). Therefore, since 1) is a cognitive process, 2) is a cognitive process as well and cognition extends.
