Everyone aside from the Assassin know who the King is, The King knows nothing except who they are and the same goes for the assassin. So everyone except the two know at least two ppl they can trust. How can we use this to our advantage is what I'm trying to figure out.
Well actually they don't know two people they can trust, they know two people who are innocent, one of them being themselves, and they can only trust the king to be honest, not correct as the king actually knows less than the person.
Knowing the king doesn't tell us anything useful really as hinting at that information only gets the king killed.