Note: This skill is independent analysis and commentary, not a reproduction of the original text. It synthesizes the book's core ideas with modern startup practice, surfaces where frameworks are outdated or incomplete, and integrates perspectives from adjacent disciplines. For the full argument and context, read the original book. The Four Steps to the Epiphany "Startups that survive the first few tough years do not follow the traditional product-centric launch model. Through trial and error, hiring and firing, successful startups all invent a parallel process to product development. I call t…