The development of externalist conceptions of intentionality informs the reception of Russell’s legacy in contemporary philosophy of mind as well. Russell also helped to put in play a conception of the intentionality of mental states, according to which each such state is seen as involving the individual’s “acquaintance with a proposition” (counterpart to Fregean “grasping”)—which proposition is at once both what is understood in understanding expressions by which the state of mind is reported,