Knowledge blindness is the cognitive bias of assuming your own knowledge and skills are common because they feel basic to you. The more deeply you've internalized something, the less valuable it seems. Experts are the worst offenders: what took them years to learn now feels like "obvious stuff everyone knows." It isn't.
Key Points
This bias directly throttles what people choose to share, write about, and build products around. If you think your knowledge is unremarkable, you won't turn it into articles, courses, newsletters, or paid resources. Your vault stays private. Your expertise stays trapped.
Justin Welsh offers a practical antidote: list out all the skills and knowledge you consider "basic." Then search social media for people struggling with those exact topics. The gap between what you take for granted and what others desperately need is usually enormous. That gap is where content, products, and value live.
Knowledge blindness is closely related to the Curse of Knowledge cognitive bias, where experts struggle to remember what it was like not to know something. But knowledge blindness adds a specific layer: it's not just that you can't see the world through a beginner's eyes; it's that you actively devalue what you know because of how effortless it feels.
This explains a pattern common in the PKM community: practitioners with rich, deeply linked vaults who never publish anything. They look at their notes and think, "Who would care about this?" The answer is almost always: more people than you think.
Overcoming knowledge blindness is essential for the PKM-to-publication pipeline. Every piece of knowledge in your vault that you consider trivial is a potential article, thread, or product for someone earlier on the same path. The feeling of "this is too basic to share" is almost always a signal that you should share it.
Open Questions
- How can PKM systems help surface notes that represent undervalued knowledge?
- Is there a reliable self-assessment method to calibrate how unique your knowledge actually is?
- Does knowledge blindness worsen over time as expertise deepens?
References
- Justin Welsh's exercises on identifying undervalued personal knowledge
- Curse of Knowledge cognitive bias literature