Introduction: Moments of Enlightenment to serve? What is the role of the restaurant inspector in this context? Is the inspector responsible for installing the lightbulb, or is their job limited to inspecting it? The answers to these questions will shape the answer to the original question. Without these answers, the question can only be answered in the abstract and is ultimately unanswerable. Language, not mathematics, is the key to unlocking the answer. Okay, less funny than the Seinfeld one, but still—impressive! Even from these brief performances, it seemed clear to me that GPT-4 had reached a new level of proficiency compared to its predecessors. And the more I interacted with GPT-4, the more I felt this way. Along with writing better lightbulb jokes, GPT-4 was also skilled at generating prose of all kinds, including emails, poetry, essays, and more. It was great at summarizing documents. It had gotten better at translating languages and writing com- puter code, to name just some of its powers. So while GPT-4 wasn’t a new device per se, it felt to me like something that could become as indispensable as our smart- phones—a 12-in-1 multi-tool for your brain. By that, I mean OpenAI had created a tool that became “intelligent” enough to productively assist you in many different environments, in many different ways. Much of what we do as modern people—at work and beyond— is to process information and generate action. GPT-4 will mas- sively speed your ability to do these things, and with greater breadth and scope. Within a few years, this copilot will fall somewhere between useful and essential to most profession- als and many other sorts of workers. Without GPT-4, they’ll 5