What is the true measure of progress for a startup? It's not lines of code or products shipped; it's validated learning. In part two of our deep dive into The Lean Startup, we explore the core metrics and decisions of the methodology. Our hosts unpack the concept of "validated learning," a rigorous method for demonstrating progress in a chaotic environment. We also analyze one of the book's most famous concepts: the "pivot," the structured and courageous decision to change a fundamental aspect of the business strategy. This is a look at the scientific and often gut-wrenching process of navigating a startup through uncertainty.