One fascinating part of this story is Göran Lambertz, who was chancellor of justice during the trials and is now a supreme court judge. https://en.wikipedia.org/wiki/G%C3%B6ran_Lambertz He fervently maintains that Quick is indeed guilty, and that there was nothing at all wrong with the proceedings of the justice system. In fact he claims, to this day as far as I know, that the evidence against Quick is "extraordinari…
I don't see anything wrong with the math. It simply means that Quick is certainly guilty, with an 83% chance of being double-guilty, which is an obscure legal term I don't expect the technocrat audience of HN to be familiar with.