How Do You Predict the Success of a Product in a Good Business?

Adam Bergman: My question is how you go about attempting to forecast the degree of future success of one specific product in a good business versus another such that you invest in American Express and Coca-Cola rather than Diners Club or RC Cola, for example. Charlie Munger: I'm sorry to get into this technical stuff, but Jonathan always asked me questions like that. So I want to answer them. And so far, we've been, I would say we've been right on American Express and Coke," he says.