The war has taught Neville many things: the efficacy of different healing potions; the sensation of being both yourself and not yourself as you torture a fellow student under imperius, floating in the liminal space between the two; the time it takes between hearing a twelve-year-old scream and finding them cornered next to a tapestry, like the space between a thunderclap and lightning. The war has taught Neville many things, and though he would like to credit the war with his awareness, wherever he is in a room, of Anthony Goldstein, he's more self-aware than that.