One of the keys that is missed often is mis-reading the room (so to speak). That is, the material (e.g., a tutorial) is written for people with more (background

One of the keys that is missed often is mis-reading the room (so to speak). That is, the material (e.g., a tutorial) is written for people with more (background) experience, not less. If I knew what you knew I wouldn't need your tutorial. Yet there you are speaking to me...right over my head.