There are some claims that might not have that number of evidence, so it is not limited to three pieces of evidence the number does not matter. Do violent video games have a negative psychological impact on children?
First, they might not realize what a treasure it is. So, why not do it? Introduction: Mention the official statistical data of prostitution rates in the United States. If you have more information to share, you may include up to five body paragraphs.
Help the readers see your confidence and believe you. To make the claim believable you need to use as much evidence as you can.