Final answer:
Asking the question "How do you know?" helps to determine if you have good supporting paragraphs.
Step-by-step explanation:
The question "How do you know?" is a good question to ask to tell if you have good supporting paragraphs that support your main idea. Asking this question helps you evaluate whether you have provided sufficient evidence and examples to back up your main argument. By asking this question, you can ensure that you have presented a strong and convincing case to support your main idea.
Learn more about evaluating the strength of supporting paragraphs