. . . Ask a question and then investigate what the answer is. That’s the core of the scientific method—formulate a question, come up with a hypothesis, make a prediction based on that hypothesis, then test to see if that prediction holds. Not only is that a good way to do research, it is also a great way to present your research to others. Start off with your question! That does a lot of things. It clarifies in the reader’s mind what the purpose of the study is. It helps the reader to relate the study you’ve done to the things that interest them. And it helps you and the reader have a way to see if the study you’ve done has accomplished something. And remember—a study that disproves your hypothesis may be just as interesting and useful as one that confirms it.

http://www.baseballprospectus.com/article.php?articleid=22147

Good advice for any essay writer, writing about any subject—including TOK students writing TOK essays!