LESSON 4 · The Mental Models Playbook
Using Occam's Razor Wisely
Count assumptions, not words. Start with the explanation that needs the fewest hidden premises, then add complexity only when the evidence clearly requires it.

The razor does not guarantee the simplest explanation is correct. When evidence is equally balanced, the simpler hypothesis deserves your initial bet because it has fewer points of failure. When decisive evidence favors complexity, follow the evidence.