"You could do that?" she asks, intrigued. "Which kind would you pick? There's three. Technically four. Unicorns like me have horns and can do magic; earth ponies don't have horns and are strong and good at some kinds of things; pegasi don't have horns and do have wings and they can fly and manipulate the weather. And princesses are like all three kinds of ponies together, and they have horns and wings and can do magic and fly and manipulate the weather and are strong and good at earth pony things. But princesses are very rare and I don't know if they're a kind of pony in the same way the other three are."