I am not declaring this check definitive. For example, some people may have brushed their teeth in the morning - I believe Moriarty-kun may have done so? But I did not. I was looking for Power-chan first thing in the morning because I was concerned for her in the aftermath of the doll game, and was approached by Roland-kun and alerted to the commotion in the kitchen.

[She's definitely making a note that Akane did brush her teeth at some point...]