Abstract
Contrary to what Descartes argued many centuries ago, the self seems far from being a simple and indivisible entity, easily accessible to personal scrutiny. In this paper I will endorse an anti-cartesian attitude, starting from two different perspectives. On the one hand, I will consider clinical and developmental studies showing how strongly interpersonal relations modulate the quality of introspective access. In this section, I will take into account Neisser's theory of self knowledge and Gergely and Watson's constructivist approach. On the other hand, I will consider the extended mind paradigm, a recent philosophical model that seems compatible with the idea that some important aspects of the self could also be extended to the physical world. This latter point acquires special importance when considering how much some particular electronic tools such as second generation search engines will be widespread in the future.