1 Ophelia: So we’re here in a faithful recreation of an old English town.
2 Ophelia: Attending a staged wake for an actor apparently killed by a prop weapon.
3 Ophelia: And Angela is prying into it as if it’s a real murder mystery.
4 Ophelia: I don’t think she knows what’s really happening here.
4 Mercutio: She doesn’t know?

It's a general rule that the more confident you are that you know what is happening in the world, the less likely you are to be correct.