What is the purpose of Grammar?

Ben, Katie, Logan and Mike discuss why we call one way of speaking proper and another colloquial. Along the way, we learn about Ben's hardships at an Orioles' game, David Foster Wallace and Descriptive vs. Prescriptive dictionaries, what Wittgenstein imagines construction workers are like, John McWhorter's Theory of Creole. We also ask about the benefits and tradeoffs of having many different ways of speaking.