Course 0 has four lessons. Lesson 1 is public. Lessons 2–4 follow the same methods sequence and sit behind membership when published.

Course 0 sequence

1. L1 · Public: A paper is not a protocol — What a study can do, and five evidence grades as kinds of object.
2. L2 · Coming next: Approval, compounding, and research use only — Why those labels are different objects — not interchangeable permissions.
3. L3 · Coming next: How to label an observation — The structured report form, taught before anyone files one.
4. L4 · Coming next: Confounders and product identity — Why “it worked for me” is data and not proof.