Harry smiled a little then, just a bare curve of lip. "We're used to believing in things most people won't at this point, aren't we?" He listened as she spoke and forced himself to pay attention. Hermione had been preaching knowledge for years; something the habit to sort of tune out was still strong.
"So it's possible these nightmares are warnings about something that'll happen? Or maybe something that's already happened? Did you find anything about magical disturbances that might cause nightmares?" Harry leaned forward, forgetting his food for the moment.