This post is a reflection on the notion of expertise, and the risk it can bring to innovation and openness to new ideas.
Without a clear set of rules to use in evaluating expertise, I instead try to evaluate founders based on what I can learn from talking to them. This is especially true in areas that I understand fairly well. While there are certain things I might expect a founder to understand about what they're doing, I'm much more interested in how they think and test assumptions. This is part of how I try to figure out if I'm investing in potential (good) or track record (not so good).