Manapa wrote: maybe it would help to clarify what Buddhavacana is?
is it words of the Buddha, or is it words of Dhamma from an enlightened being, or simply words of Dhamma from anyone (as in what is said, taught etc is Dhamma but the person may or may not be enlightened)?
number 3 - Who but the Buddha could have fathomed the Abhidhamma.
maybe a Arahant?
Good points!whether the Abhidhamma is or isn't from the historical Buddha I don't think matters, whether it is Buddhavacana (in the wide sense that not all the teachings in the suttas are spoken by the Buddha) or not I think does.
I am not sure, to be honest. If it just means from an enlightened being, then there probably is no dispute among Theravadins.