1) the space between rūpa(s) is also conditioned in Sarvāstivāda Abhidharma, but how do we know he refers specifically to this rather than any space?
2) how is "uncaused" here differentiated from "unconditioned?" Are there any other uncaused dharmas in Theravāda that are also conditioned? Are rūpa and citta in their ultimate senses "uncaused" in Theravāda? That would be an example of something both uncaused and conditioned.
3) does Theravāda traditionally group space with nibbāna like Ven Nāgasena does, which is definitely a feature of Sarvāstivādin Ābhidharmika discourse?