A redated post. This was the closest I could come up with to AMC's request. Though he may be thinking of a Menuge paper.
This is a well-known Dennett paper on the issue of original intentionality. He seems to be arguing:
1. If naturalism is true, then humans cannot possess original intentionality.
2. Naturalism is true.
3. Therefore human beings cannot possess original intentionality.
It wasn't me, but an atheist fellow graduate student at University of Illinois at Urbana who suggested that the argument could be turned around into an argument for theism against naturalism.
1. If naturalism is true, then humans cannot possess original intentionality.
2. Human beings do possess original intentionality.
3. Therefore, naturalism is false.