This is a nice look at the "weakly held" part. I find it interesting that Paul Saffo, who originally coined this term talked about forming a strong opinion out

This is a nice look at the "weakly held" part. I find it interesting that Paul Saffo, who originally coined this term talked about forming a strong opinion out of pure intuition, despite the unknown. "Allow your intuition to guide you to a conclusion, no matter how imperfect — this is the “strong opinion” part." However, I think most people use this term today with the assumption that you should have a strong opinion only if you actually know what you are talking about.