This item asks only: after going deep into the ground and dismantling fixations, can the thought again account for the differentiated world it claims to explain, without reintroducing the entities or dualities already dismantled?
Positive evidence: The domains Nāgārjuna actually undertakes to explain include causality, the Four Noble Truths, the path of practice, karma and fruition, and conventional dharmas. Ch. 24 states “because there is the meaning of emptiness, all dharmas can be accomplished” (E-07), and points out in reverse that clinging to intrinsic nature leads to “no cause and no condition, no Four Noble Truths” (E-29, E-06). Ch. 17 does not leave just one line, “the fruition of karma is not lost”: it goes on to say “karma fundamentally does not arise, because it has no fixed nature” (E-30), “afflictions and karma are empty — how much more so are bodies” (E-31), and finally compares afflictions, karma, agent and fruition to illusions, dreams and the like (E-32). This shows that the return does not restore a permanently abiding karmic substance, but keeps causes, conditions and functions within the absence of fixed nature.