Harry is not cool.
If someone yells, then they are not cool. If someone is angry, then they yell. If someone flies, then they are cool. Every person that knows magic can fly. All wizards know magic. Harry either yells and flies, or neither yells nor flies. Potter is a wizard and flies.
∀x (Yell(x) → ¬Cool(x)) ∀x (Angry(x) → Yell(x)) ∀x (Fly(x) → Cool(x)) ∀x (KnowMagic(x) → Fly(x)) ∀x (Wizard(x) → KnowMagic(x)) (Yell(harry) ∧ Fly(harry)) ⊕ (¬Yell(harry) ∧ ¬Fly(harry)) Wizard(potter) ∧ Fly(potter)