 This gives us two different anti-platonist alternatives to the view that belief reports involve references to propositions. First, there is the conceptualistic (or mentalistic) view that belief reports involve references to sentences in our heads, or mentalese sentence tokens. And, second, there is the physicalistic view that belief reports involve references to external sentence tokens, i.e., to piles of ink, and so on (versions of this view have been endorsed by Carnap (1947), Davidson (1967), and Leeds (1979)).