The Intentionality of Thoughts

The key to Welty's case for conceptualist realism over against platonic realism is the intentionality with a T this time of propositions and possible worlds. Intentionality is the property of being about something or of something. It signifies the object directedness of something. Our thoughts, for example, have intentionality. But abstract objects are not intrinsically intentional. They have at best extrinsic or derivative intentionality by being the objects of doxastic attitudes,. In virtue of acquaintance with our own thoughts, we are already committed to the reality of thoughts. So, if propositions can be taken just to be thoughts rather than abstract objects, we shall have a more economical or parsimonious ont