有看到這個
Treated as: If a weapon’s description says it is “treated as” another weapon, a character lacking the appropriate exotic weapon proficiency, can still use it as if it were the other kind of weapon and feats such as Weapon Focus still apply, as do abilities requiring a certain weapon. For example, the butterfly knife allows a proficient user to open or close it as a free action and is otherwise treated as a dagger, meaning she can wield it as a dagger, gain the benefit of Weapon Focus (dagger) when wielding it, use it as the target of a spell that only affects daggers, and so on.
但我個人是很想判不行的(