Okay kiddo, so you know when you and your little brother are playing and you argue about something like who gets to pick the game or where to put the toys? Well, sometimes in books, movies, or TV shows, the characters also argue about small things like that. This is called a quibble. It's when people argue about little things instead of focusing on the bigger problem.
And this is sometimes used as a "plot device", which means it's used by the writer to create tension or conflict in the story. Imagine if you were watching a movie where the main characters are trying to escape a dangerous situation, but they keep arguing about small things like who gets to hold the flashlight or where to go. This would make the situation even more tense and exciting to watch because you would want them to work together and focus on escaping the danger instead of arguing about small things.
But remember, it's important to not always quibble about small things in real life, especially when it comes to bigger problems or situations that require our attention and cooperation.