Marc Andreessen explains how introspection and learning from mistakes can make you a worse VC: "The problem with learning from mistakes—sometimes it's good and sometimes it's bad." "If you invest in a category, a kind of company, or you invest in a kind of founder and it doesn't go well—it's extremely easy to learn from the mistake and to basically say, 'Alright, I touched that hot stove. I'm never doing it again.'" "And then, you can tell me what happens next—the next thing shows up and…