Let's run some scenarios. These are from my perspective, mind you. I'm excluding one where Joseph is mafia, that doesn't seem to make sense given what we know.
- 3 scum left, Eevee telling the truth.
That puts the only remaining "true town" at me and whoever of skip/mail-mi is town. Maybe. There is some argument to be made that skip and mail-mi are both scum I guess. Anyways not much to be done in this setting, we can lynch scum but once we are at Joseph/Eevee/X (scum) remaining, Joseph has no reason to end the game in a loss for them.
- 3 scum left, Eevee is one of them
Situation is similar as before, agian we need to rely on Joseph but they won't end the game for us. It's notable that before that, Joseph has an incentive to lynch scum because that opens up graverobbing.
- 2 scum left, Eevee telling the truth
We cannot lynch Joseph because that leaves us in the same situation as the 3-scum scenario detailed above. Other than that, town does have a majority and can push through any 2 lynches for a potential win.
- 2 scum left, Eevee is one of them
This is the only scenario where lynching Joseph does not lose the game. But we can just lynch Eevee instead.