He who knows nothing doubts nothing.
He who knows nothing doubts nothing.
Meaning in plain English
The saying associates knowing nothing with doubting nothing. It suggests that limited understanding may leave someone unaware of reasons for uncertainty.
Example
A reader examines the evidence behind a sweeping claim rather than treating its certainty as proof of knowledge.
Deeper explanation and when to use it
The paired absolutes sharpen the contrast but are not a reliable diagnosis of anyone’s knowledge. A useful application asks what evidence supports confidence and what questions remain. Informed people can also be confident, and uncertainty alone does not establish expertise or make a conclusion better.
When to use it
Use it to discuss the basis of confidence with individual evidence checked.
Keep in mind
Neither confidence nor doubt alone establishes a person’s knowledge or ignorance.
Edsverb editorial interpretation · agent reviewed · 2026-10-05. This explains the saying; it does not establish its historical origin.
- Source
- Contributor-provided proverb reference
Supplied reference A; unit 901; PDF page 126
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Preserved as printed; independently unverified. - Historical coordinate
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