Richard Feynman's method: if you can't explain something simply, you don't understand it. Teaching forces you to confront the gaps in your own understanding. Every "I'm not sure how to explain this part" reveals a concept you've memorized but haven't truly integrated.

Teaching critical thinking is especially challenging because the skills are meta-cognitive — they're about thinking about thinking. You can't just tell someone to "think critically" any more than you can tell someone to "be creative." You have to demonstrate the process: here's the claim, here's how I evaluate it, here's where I'm uncertain, here's what would change my mind.

The transmission challenge: critical thinking skills feel condescending when delivered as advice. "You should check your sources" sounds preachy. Effective transmission requires: modeling the behavior (think aloud, show your process), asking questions rather than delivering answers (Socratic method), sharing your own errors and updates (vulnerability normalizes learning), and meeting people where they are (not where you think they should be).

The most effective transmission methods:

Share your own journey: "I used to believe X until I learned Y" is more persuasive than "You should believe Y." People relate to narratives of change, not instructions.

Ask genuine questions: "How would we check that?" is better than "You didn't check that." Collaborative investigation invites participation.

Provide tools, not conclusions: Teaching someone to evaluate a study (5 filtering questions) is more durable than telling them a specific study is bad.

Be honest about uncertainty: "I'm not sure, but here's how I'd find out" models the process better than false confidence.

Know when to stop: You cannot force someone to think critically. You can create conditions that make critical thinking attractive. The best you can do is plant seeds — water them by modeling the behavior — and accept that some seeds won't germinate. This is not failure; it's the reality of voluntary cognitive change.