The Big Bang Theory: Arguing about Thor and his Hammer
Math → Algebra → Transitive Property of Equality
Penny, Amy, and Bernadette discuss how other superheroes can possibly pick up Thor's hammer. Bernadette suggests that, through the transitive property, the Hulk could pick it up by picking up Thor while he's holding his hammer. Amy disagrees with her, and Penny tries to apply the logic to picking up a guy at the bar.