The three-page paper that shook philosophy: Gettiers in software engineering.

Supppose you’re standing in a field and off in the distance you see a cow. But suppose that what you’re actually looking at isn’t a cow, it’s just a convincingly lifelike model of a cow made out of papier-mâché. You’re not seeing a cow, you’re seeing the model. But then finally suppose that right behind the papier-mâché cow is a real cow!