Logical Reasoning, provable/powerful question

So I am learning Logical reasoning through the book "The Loophole". So it says that "Your loophole and resolution have to be powerful" and "Your inference and controversy have to be provable" But then when I got to the Provable question stem section it said that the question stems-- conclusion, NA, Method, Argument part, The flaws-- all used loophole. Can someone please explain this? I don't understand.. because the book initially said that loopholes have to be powerful.