Again, from your pov it's just clear. You have 3 players. Ultra, Fang, Richard. Richard flips scum it's 3vs1. 2vs1 the following day which is you, Ultra and Fang. Then you look at Ultra's posts again and realize he considered both you and Richard could be Town which makes no sense from his pov since like you he had a pov of 2 scum among 3 players including Richard and you if Town and thus you realize he has to be the remaining scum. This isn't super hard if you just THINK.