"Yes, well, it was quite irresponsible for them to not include Polyjuice detection in the first place; the Thief’s Downfall wasn’t that difficult to amend for the school gates and Floos, Professor Flitwick and I reverse-engineered the charm in less than a month. It was the Dark Magic detection that took quite a bit longer to figure out, but it was important we thoroughly researched the subject and did things the right way. I mean, Voldemort got into the school our  first  year! Don’t get me started on the troll." She grimaced, crossed her arms, and shook her head.