In the previous section, I demonstrated that even after hours of study, you can make mistakes and get the wrong answer.

This shouldn't mean that you should procrastinate and forestall signing up to your exam forever: believe me, you can study as much as you can, but there will always be a question that you won't fully understand (it may happen if English isn't your mother tongue) or simply that won't find a fit with your knowledge base.

If you schedule the exam, you'll find yourself committed to that date and efficiently use the remaining time to study and prepare for a successful result.