paulwall:A) Assumes the instructor is competent (not all are, even after 15 years)
The race is not always to the swift, nor the battle to the strong, but that's the way to bet. --Damon Runyon
A far flung analogy: when my first son was a somewhat new driver, he saw the oil pressure light on the car go on. He looked and saw that he had plenty of oil. He assumed the oil light was malfunctioning--it does happen, after all. One blown engine later, he learned about oil pumps.
If an instructor suggests that you are not ready to do something, and you think you are, assuming tht the instructor must be incompetent is like assuming the oil light is malfunctioning.