I think his point was that you shouldn't call him out in that way when you're also making assumptions, you said it like you corrected him & he purposely ignored your correction, which yes does happen on this forum but it's besides the point. Unless I'm also mistaking what he thinks he was talking about the core & HBM package used for the VII being repurposed from the Instinct range (MI50), Not that they had the same pcb & the only thing changed was the heatsink & shroud.
As for how & when the cores are tested & spilt between the MI60 & MI50, To me it looks like the core is tested before the memory is added, If it wasn't they'd have to have a lot of failed cores with 32gb's of HBM on them which doesn't make sense to me due to the costs so maybe they do test & split the cores into two piles before adding the HBM, one pile for MI60 & the other pile for MI50, then they add the memory and maybe at that point they test the MI50's again (or don't) and divert some of them to the VII range.
@Panos I don't like making presumptions so correct me where I'm wrong.