## 1. Solution-first -- 自上而下 "supply-induced demand" [[伟大的科技发明创造以前不存在的需求]] [[创新是重新定义人类的需求与渴望]] 先做产品（solution），然后发布 + 迭代更新 ## 2. Demand First -- 自下而上 "problem-induced solution" [[Authentic demand is the heart of successful innovation]] 先 identify authentic demand，[[4 VAULT/01 Public/Sell the idea before building the product|Sell the idea]]，再 build product [[Need a wedge into a market]] start humble, achieve concrete impact, and then scale to whole humanity