yuma's posts are reading scummy, but his claim is basically conf!town until he's not conf!town.
Occam's Razor means the most likely thing to be true is probably true. (I think, right? I mean, if I'm wrong on that, then obviously I'm using the phrase incorrectly.)
So you run the scenarios of why Andrew says there are exactly 3 scum, and states that with a veracity that belies absolute knowledge. Here are possibilities:
--Andrew is scum, so he knows there are three of them.
--Andrew has a power role that told him on Night 0 how many scum there are.
--Andrew is a townie who made a mistake that requires he have an absolute conviction that there are 3 scum when he has no reason to believe that.
Am I missing anything? Please bring them up if there are more likely scenarios. But, based on likely scenarios, Occam's Razor says the most likely is true, and the most likely is Andrew is scum.
I've admitted to being less correct about ADK's statement, especially given how he qualified it with his parentheticals.