A communication receiver who is preparing his comment or answer and not really listening to the sender is using jargon. using semantics. biased. rehearsing.

He is using "rehearsing".

Rehearsal in instructive psychology alludes to the intellectual process in which data is rehashed again and again as a conceivable method for learning and recalling it. Rehearsal is seen in educational psychology as an insufficient method for getting data to the long term memory.