#despite being very smart indeed - differential equations and special skills

[shallowseeker]

Since the dash is having fun with intelligence, let's also take a moment to appreciate Sam conceptualizing the Campbells as "brawn" and the Winchesters as "brains," even after he directly witnessed how much competence and intelligence Samuel Campbell was wielding in-real-time.

SAM: What Cupid said about heaven busting ass to get Mom and Dad together. The Winchesters and the Campbells – the brains and the brawn.

No only does Sam buy the unreliable-Heaven's cupid story (I'm not so sure Dean did), but he's overlaying his prejudices on top of it, pigeon-holing each into a 2D stereotype.