LESSON 3 · Think Like Sherlock
Not Just Any Explanation
Your car will not start. Possible explanations: dead battery, faulty starter, aliens disabled it, or a wizard cursed it. All four "explain" the evidence.

Inference to the best explanation (IBE) has clear criteria. The best explanation must be consistent with all known evidence, simple enough to avoid unnecessary assumptions, and fruitful in generating testable predictions. A theory that explains more with less wins.