"Use expert-curated data to unlock outsized gains When training AI models, internet data alone is never sufficient — the real performance gains come from data curated by genuine domain experts. Hashimoto explains that leading labs now 'hire experts like lawyers, former international math olympiad winners' to write training data by hand, because this human expertise captures the kind of reasoning that the open web simply cannot provide. For anyone building data-driven systems — from AI tools to business analytics — the takeaway is that investing in high-quality, expert-generated inputs will outperform simply adding more volume of mediocre data. Source: Tatsunori Hashimoto, The Cognitive Revolution (or similar Stanford AI podcast), Small Language Models and AI Democratization"