This thread illustrates what is arguably the greatest single problem aflicting the JAR CQB system.
No, I do not mean the poorly worded questions. There are quite a few of those but they are not the single greatest problem.
The single greatest problem is that having been told about the poorly worded questions, a large number of students start with the assumption that if they cannot answer a question, then that question must be defective. This leads to the situation where students devote all of their efforts to convincing themselves that the question is defective, instead of simply attempting to find the best answer.
The post by Golf Juliet Bravo is an example of this. The post by EK4457 provides a much more productive approach.