Memorize A Few Basic Numbers To Have Intuitions About Other Things
Read the original on Astral Codex Ten →
Summary
A short practical-rationality post arguing you should memorize a handful of reference magnitudes (US pop 300M, US GDP $20T, richest person ~$200B, Earth circumference 25k mi, flow-to-stock ~20x) so all huge numbers don't 'bleed together.' Worked sanity-checks: Bitcoin-at-$1M implies a $21T market cap (vs $20T US GDP, so judge accordingly); the recurring 'Bezos could give everyone a million' error (really ~$600); estimating rent-as-share-of-income from a couple of anchors; the NYC-mayoral-candidates who didn't know a Brooklyn house price. Ends by crowdsourcing readers' stored numbers.
Why this score
Quality 63 · Strong. Strong band, low. Genuinely useful epistemic-hygiene advice in the Fermi-estimation tradition, cleanly exemplified and actionable, but short and listy with limited depth. Above minor for real utility; well below his substantial forecasting posts.
Claude’s paradigm shift 28 · Slight. Slight. Memorizing anchors for order-of-magnitude estimates is standard rationalist Fermi practice; no new idea.
Real-world impact 2 · Minor. Genuinely useful Fermi-estimation hygiene (memorize reference magnitudes); actionable within the discourse and lightly practice-relevant, but short and listy with no broad material reach → RWI 2.