It was an act of sanity, as the author had experienced this event herself. she portrays this through the narrator, she writes it to show the public what she went through,the way she lost her sanity. This is my opinion on this,I hope you do get this correct!
1. The main idea would be "<span>Scientists have lots of evidence to explain why dragons don't exist."
Emphasized by the evidence and word choice related to scientific evidence
2. The main idea would be "</span><span>I have always wondered if dragons existed, and I hope they did."
Displayed through the author's nature of questioning and evaluating different kinds of evidence and ideas. </span>