english: This is a question I got from a reader, an anonymous reader, and the subject line just said, "Urgent," and this was the entire email: "If people had wheels and could fly, how would we differentiate them from airplanes?"
non_english: Ovo je pitanje koje sam dobio od čitaoca, anonimnog čitaoca, a u naslovu je pisalo: "Hitno." a ovo je bio čitav mejl: "Ako bi ljudi imali točkove i mogli leteti, kako bismo ih razlikovali od aviona?"