 According to the extended mind thesis (EMT), mental states (e.g., beliefs) can supervene in part on extra-organismic elements of the world, such as laptops, phones and notebooks, that are typically regarded as ‘external’ to our minds. This thesis, defended most notably by Andy Clark and David Chalmers (1998), should not be conflated with comparatively weaker and less controversial thesis of content externalism (e.g., Putnam 1975; Burge 1986), according to which the meaning or content of mental states can be fixed by extra-organismic features of our physical or social-linguistic environments.