I've seen that effect too, where an instructor essentially knows the course materials, but without knowledge of the subject. If the course materials contain errors, they don't have the background to notice it...and, for some personalities, its dogma that must be...no ifs and or buts.
Some instructors will consider that the material has mistakes, and, some will not.
The most frustrating are those maddening examples of common knowledge being in conflict with the presentation, and the instructor rigidly standing by the mistake as FACT.
My EARLIEST example I can think of was when I was in Kindergarten (Back in the '60's) and we watched a film about computers, and how they will change the world.
The film stated that computers would allow a worker to do 8 hours of work in only 2 hours, so people would only need to work 2 hours a day.
The teacher was using a "Study Guide" to quiz us on the film, and, she asked me how long people would have to work per day in the future, and I said all day, just like now....and she that's wrong, they will only have to work for 2 hours per day.
I said, why would a boss pay for a computer to get more work out of you, and then let you go home early....wouldn't he just want to make more money?
We argued, and I got sent to the principal for not admitting I was wrong.
:spank:
