Det är underförstått att ordern inte hade några andra idéer som de trodde kunde fungera. Således övertygade Mundungus dem genom att helt enkelt föreslå en idé som de trodde skulle kunna fungera. Från samtalet när planen förklaras till Harry (min betoning):
"Let’s have no more arguments. Time’s wearing on. I want a few of your hairs, boy, now."
"But this is mad, there’s no need —"
"No need!" snarled Moody. "With You-Know-Who out there and half the Ministry on his side? Potter, if we’re lucky he’ll have swallowed the fake bait and he’ll be planning to ambush you on the thirtieth, but he’d be mad not to have a Death Eater or two keeping an eye out, it’s what I’d do. They might not be able to get at you or this house while your mother’s charm holds, but it’s about to break and they know the rough position of the place. Our only chance is to use decoys. Even You-Know-Who can’t split himself into seven."