 It would be appropriate here to note the emergence of another sort of externalism in philosophy of mind and cognitive science since the 1990s, distinct from the “content externalism” made prominent by Putnam and Burge, as strains of “embodied”, “embedded”, or “enactive”, theorizing about perception, cognition and action gained prominence. For instance, on the “extended mind” view advocated in Clark and Chalmers 1998, mental processes are not confined to representational activity inside one’s head—they encompass an embodied interaction with one’s environment—cognition (broadly construed) is not limited to the manipulations of internal representations, but extends to the use of things out in the world.