Thinking Lenses

Paste the prompt into a new chat in ChatGPT or Claude, tell it a decision you're weighing, and it runs your reasoning through the right lens, like first principles, inversion, or expected value, etc.

The lenses

  • First principles (Elon Musk's five-step algorithm)
  • As simple as possible, but not simpler (Feynman and Einstein)
  • Constraint diagnosis (Alex Hormozi's "why can't we do more?")
  • Second-order effects
  • Biases and fallacies (Rolf Dobelli and Charlie Munger)
  • Expected value, asked in counts out of 100 tries
  • Regret minimization (Jeff Bezos)
  • Weighted decision matrix
  • Behavior design (James Clear's Atomic Habits)
  • Opportunity cost (Charlie Munger)
  • Inversion and the pre-mortem (Charlie Munger and Gary Klein)
  • Tradeoffs, not solutions

Built from Elon Musk's five-step algorithm, Richard Feynman, Alex Hormozi's The Game podcast, Rolf Dobelli's The Art of Thinking Clearly, Charlie Munger, Jeff Bezos, James Clear's Atomic Habits, and Gary Klein's pre-mortem.