 Some further objections to the account—including, among other things, the question of what should count as the best systematization; if understanding metaphysical explanation in unificationist terms means having to give up on the “impure logic” of such explanations, and; if given unificationism, logical truths will lack metaphysical explanation—are discussed (and ultimately rejected) in Kovacs (2020). A classic objection to the unificationist account of causal explanation, finally, is that it, just like its close cousin the DN-account (see  §6.2),  fails to make sense of the asymmetry of such explanations, at least not without assuming causal realism. A similar objection may well be available to those who combine unificationism and anti-realism about metaphysical explanation. 