Avoiding certainty is hard but necessary. Bret & Heather use real cases to think scientifically.

"The nested sets nature of logic, which branching diagrams can reveal in a different way than if you just nested the sets within parentheses or something, can show you that it could be Tyler Robinson and still not have him be some lone gun nut, which is exactly what you have established here."

- Heather Heying
...
https://www.youtube.com/watch?v=JC6Taz1LgTk