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Talya [doing number theory homework with Aleks and Kristen]: I don’t know about this one, Aleks, 22.2…are you sure we have to prove it?
Aleks: That’s what he said in class, right?
Kristen: Yeah, I just did it numerically.
Talya: So did I.
Aleks: Ooh…well, I’m sure you’re fine then.
:later in class, going over homework:
Chris: Yes, and for this particular problem, 22.2, you have to prove this part to get full credit…
Aleks [from across the room]: Oooh, snap!
[Talya and Kristen burst out laughing]
Chris: I think I missed something there…