Listing and organizing supporting ideas, whether informally or formally, will help you develop your thesis. An informal outline can be drafted and revised quickly to help you figure out a tentative structure.
Here is one student’s informal outline:
Working thesis: Animal testing should be banned because it is bad science and doesn’t contribute to biomedical advances.
A formal outline may be useful later in the writing process, after you have written a rough draft, to help you see the logic and organization of your draft and to help you identify any gaps.
In each of the following pairs, which sentence might work well as a thesis for a short paper? What is the problem with the other one? Is it too factual? Too broad? Too vague? Use the problem/solution approach from “How to solve 5 common problems with thesis statements” to evaluate each thesis.