While i don't disagree that it matters, I also personally think it's a stretch to call this incompetence. It's like saying the president should know every detai

While i don't disagree that it matters, I also personally think it's a stretch to call this incompetence. It's like saying the president should know every detail of what individual FBI agents do on a daily basis. Essentially, I can't think of anyone who wouldn't have taken the same approach to preparing for argument that he did here.