[KongchangAI]
Unverified50% confidenceFactExact time

The Zettelkasten note-taking method was popularized by German sociologist Niklas Luhmann, whose knowledge system contained approximately 90,000 index cards.

1
Sources
50%
Confidence
Long-term
Relevance
9/2/2026
First Seen

Sources

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Stable URI
https://kongchang.com/claim/843042
API
curl https://kongchang.com/api/v1/knowledge/claims/843042
MCP
get_claim(id=843042)