What do Miles, Takumi, Alaska, and Chip get in trouble for in "ninety-nine days before"? How do they respond?

After a long day of study Chip, Miles, Takumi and Alaska take a smoke break at the Smoke Hole. They are discovered by the Eagle, who calls them to "Jury" the next day. When Miles comments on how casually Alaska seems to be taking the situation, she comments that "sometimes you lose a battle. But mischief always wins the war."