Investing requires you to believe in your view and your hypothesis, but at the same time it requires you to have a humility that collective market could be right hand you could be wrong. Human mind is not a rational animal, but it's a rationalizing animal. And we are a self correcting action engine. It's only by documenting our processes and revisiting other times of dislocation. Another good exercise to improve your result is to have devils advocate, or attenth man, in your system who forces you to challenge the conventional wit wisdom so that you legitimize the doubt of frond.