This is my favorite primer of the past, oh, 78 days. Yes, Colin eventually discusses the wOBA formula, but the majority of his article is about what matters on offense (which everybody knows, intuitively), why current stats fail to measure it accurately (which everyone knows, intuitively, once you point it out) and why wOBA does it the right way. You don't convince people that a formula is right by showing them the nitty-gritty details (a "proof", if you will). You convince them by demonstrating you know what you're talking about and that your thought process makes sense. Then skip the sausage-making and instead let them taste the sausage. (I just set myself up for an avalanche of sausage jokes, didn't I? Crap.) Hat tip: Tango.