What is an Unknown Unknown? John Spacey, updated on
 Known UnknownsKnowing that you don't know something is useful information that can be used in decision making or as a starting point for research. For example, a swimmer who knows that riptides exist but can't remember how they work or how to escape them may be cautious at a new beach with large waves.
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Knowledge ManagementThis is the complete list of articles we have written about knowledge management.Citation
John Spacey. "What is an Unknown Unknown?." Simplicable. Retrieved June 22, 2026. from https://simplicable.com/new/unknown-unknown
Types Of KnowledgeThe differences between types of knowledge.Curse Of Knowledge
Why experts have trouble communicating.
Tacit Knowledge
Knowledge that escapes documentation.
Disinformation vs Anti-Information
Two types of broken knowledge.
Knowledge WorkA definition of knowledge work with examples.Information vs Knowledge
The difference between information and knowledge.
Expert Generalist
A definition of expert generalist with an example.
Qualitative Data
A definition of qualitative data with examples.
Objective vs Subjective
The difference between objective and subjective.
Knowledge Value
A definition of knowledge value with examples.
Risk ManagementAn overview of the risk management process.
Cascading Failure vs Resilience
An overview of cascading failure and resilience.
Business As Usual
An overview of business as usual.
Risk MitigationA list of techniques for reducing risk.Risk Mitigation vs Risk Reduction
The difference between risk mitigation and risk reduction.
Risk ControlA list of common risk controls.Risk Value
A definition of risk value with example calculation.
Risk ImpactThe common types of risk impact.Risk CommunicationA definition of risk communication with examples.Risk Management ProcessOverview of the steps in a risk management process.TrendingThe most popular articles on Simplicable in the past day.
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