Definition
Second Brain
Usually a digital system for storing ideas and knowledge. Critiqued when it refers only to polished notes rather than real cognitive process.
From the episode “Searchable Personal Memory Now”How founders on the podcast use it
A personal knowledge management system for storing and retrieving ideas, notes, and documents outside your biological memory. Tools like Notion, Obsidian, and Reflect are common implementations. Josh Gilmer argues that most second brains only store polished, finished thoughts — making them highlight reels, not actual cognitive mirrors.
Searchable Personal Memory NowHear it on the podcast1 episode
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