The final issue is correctness. Saying “five” as the result of seeing or hearing “two plus two equals” is still intraverbal because all three of the defining features are present. The “correctness” of the response is irrelevant.
A form of verbal behavior with the following features:
A verbal response
The prior controlling variable is a verbal stimulus
There is NO point-to-point correspondence between the stimulus and the response
The specific topography and dynamic characteristics of the vocal response
The musculature involved in executing the response
The modality of the prior verbal stimulus (usually either visual or auditory)
Dynamic features of either the stimulus or the response
The “correctness” of the response
Then people using ASL to communicate isn’t intraverbal?