[Sokka shrugs.] You, me, Zuko, and Aang have been here. Azula too. We all were sent home and apparently none of us remembered it. If Aang shows up, I don't think it's going to change things at home. [It's one of those things he's spent a lot of time dwelling on. Also a reason he likes to keep busy so he doesn't have to. Nothing like knowing that anything you do is absolutely meaningless.]