[he has his doubts on whether or not anyone would be able to do anything, but that stubborn sort of determination... it's familiar enough in a way to help assuage some of his initial panic. he can be just as bullheaded when he wants, too, and he tries to summon some of that up now.]

..."There is no box with only an entrance and no exit." [hadn't he said that himself just a week ago?]

Well... Exploiting a weakness. That should be something we can manage - if we can find it. [and taking what she's said into consideration:] Annie was the only one to fool everyone with a decent margin, and that was week two. We've all had time to contemplate our mistakes since then, right? Murderers got better, but the investigation did, too. If you can use that, the true Mastermind can be found.