  The intrinsic content criterion assumes a distinction between content that is derived from human thought, as the content of the word ‘martini’ is derived from thoughts about martinis, and content that arises “on its own” without having to depend on some other contentful state for its origin. The thought martini, for instance, presumably does not (or need not) derive from other contentful states but arises from some naturalistic process involving relationships between brain states and martinis (relationships that it is the business of a naturalistic theory of content to specify). Words, maps, signs, and so on possess derived, non-intrinsic content whereas thoughts have intrinsic, non-derived, original content. Granting this distinction and its importance for identifying genuinely cognitive states and processes, Adams and Aizawa dismiss the plausibility of extended cognition on the grounds that things like notebook entries and numerals written on paper do not have intrinsic content.