When his son announced he was going to become an entrepreneur, Accuray’s John Adler breathed a sigh of relief. Trip Adler, who went on to run Scribd, had always been a free spirit — and the senior Adler notes that he was likely to succeed, given his independent attitude and the fact that successful startups create their own rules. Below, the father-son team discuss the advice John gave in this Entrepreneur Thought Leader Lecture at Stanford University.