Is self-knowledge compatible with externalism?

Externalism is the view that the contents of many of a person’s propositional attitudes and perhaps sensory experiences are extrinsic properties of the person’s brain: they involve relations between the person’s brain and properties instantiated in his or her present or past environment. Privileged self-knowledge is the view that every human being is able to know directly or non-inferentially, in a way unavailable to anybody else, what he or she thinks or experiences. Now, if what I think (or experience) is not in my brain, then it seems indeed as if I cannot have any privileged authoritative first-personal access to the content of what I think. Hence, externalism seems inconsistent with privileged self-knowledge. The purpose of this paper is to provide a road towards a conciliation between self-knowledge and externalism.