Well, I had to make assumptions, of course, both about game state and about player behavior. First, I’m assuming that Astral gets killed toDay and is Scum (for which I think the evidence is overwhelming). Second, I’m assuming that there were a total of four Scum, which I think is the most likely number. Third, I’m assuming that everyone considers myself, Nanook, Guiri, and Meeko to be confirmed (or at least confirmed-enough): Myself by virtue of knowing who Aragorn was on Day 1, an implausible piece of knowledge for Scum to have; Nanook by virtue of not having been counter-claimed, either as Detective nor as Gandalf; and Guiri and Meeko by virtue of having been cleared by Nanook. Finally, I’m assuming that the Scum will kill one of the confirmed-enough every Night, for as long as there are any of them alive, and that Town will kill someone other than one of the confirmed-enoughs every Day. Since I’m trying to calculate a probability, here, I assume that the choice of whom to lynch is effectively random, within those parameters. I am not assuming that we get any more useful information out of Nanook, since as you point out the Scum will block him every Night until they kill him.
Given all this, and chaining all the probabilities together, I find that there is exactly a 0.68 chance of Town victory. My calculation is in no way based on JSexton Points, since, even to the extent that those have any validity at all (they’re given a lot more weight around here than they really deserve, and I think more than JSexton ever even intended), they’re only valid at the beginning of a game.
Obviously, there are gaps in my knowledge: First, I don’t know the total number of Scum, which could plausibly be as low as three or as large as five. Second, I don’t know what all of the power roles involved are, and I expect there to be at least one more, Frodo (but that “power” could be something that helps Town or hurts us). And third, I don’t know if Scum will make any mistakes that get them caught more easily, or if Town will make any mistakes that make them look like Scum. But hey, if I knew everything, I wouldn’t be calculating probabilities in the first place.