Noonan's arguments against methodological solipsism ("methodological solipsism," "philosophical studies" 4, 1981) assumes that mental states are individuated by (russellian) content; this assumption entails that narrowness and wideness are intrinsic to mental states. I propose an alternative "extrinsic" reading of methodological solipsism, According to which narrowness and wideness are modes of attribution of mental states, And thus reject the doctrine of individuation by russellian content. Noonan's arguments fail against this version of methodological solipsism.