Well, no. It's completely clear. It specifically asks which weighs more, a pound of one thing (a unit of weight), and a pound of another thing (again, a unit of weight). Peoples' perceptions screw them up, but the question is 100% clear on what it's asking and what the options are.
And now you're just poking at semantics. The "usually" isn't some hole that breaks the power, it's them not wanting to bind themselves with an absolute. The power makes the intent clear: This is for demons that are angry and evil, or violent, or something along those lines.