This commentary discusses critically the proposal of Foxall's intentional behaviorism that, when the use of intentional categories can be justifiably portrayed as heuristic overlay to theories incorporating radical behaviorist principles, intentionality may be part of behaviorist interpretations of behavior that occurs outside of the controlled conditions of the laboratory and practical behavioral interventions. I sketch an argument that typical uses of intentional categories for the explanation of human agency (e.g., its exercise in conducting scientific research) are not properly grasped as (...) being such heuristic overlay and so are not illuminated by behaviorist interpretations. (shrink)