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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
they know nothing
Grammar usage guide and real-world examplesUSAGE SUMMARY
'they know nothing' is correct and usable in written English.
You can use this phrase to express that someone is not aware of something or has no knowledge about a particular topic. For example: "Even after the presentation, they still know nothing about the project."
✓ Grammatically correct
News & Media
Science
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
57 human-written examples
They know nothing about me.
News & Media
"They know nothing, nothing.
News & Media
Did they know nothing?
News & Media
They know nothing about our society.
News & Media
"They know nothing about black people.
News & Media
They know nothing about my heart murmur.
News & Media
"They know nothing about respect".
News & Media
They know nothing of schools.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
3 human-written examples
And some publications just make genuine mistakes because they know nothing about the topic and garble the data.
They know nothing about this".
News & Media
They know nothing could happen".
News & Media
Expert writing Tips
Best practice
Use "they know nothing" to express a strong lack of knowledge or understanding, particularly when emphasizing a contrast between expectation and reality. For example, "Despite their claims of expertise, they know nothing about the subject."
Common error
While "they know nothing" is widely understood, avoid using it in highly formal or academic writing. Opt for more nuanced phrases like "they lack comprehensive understanding" or "they are not fully informed" to maintain a professional tone.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "they know nothing" primarily functions as a declarative statement expressing a complete lack of knowledge or understanding on the part of a group. Ludwig AI confirms its correct usage in various contexts.
Frequent in
News & Media
60%
Science
20%
Wiki
10%
Less common in
Formal & Business
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "they know nothing" is a common and grammatically correct expression used to convey a complete lack of knowledge or understanding. Ludwig AI's analysis shows that this phrase is used across various contexts, particularly in news and media, science, and wiki sources. While the phrase is widely understood, it's essential to consider the audience and context. In more formal settings, alternatives like "they lack comprehensive understanding" may be more appropriate. Understanding the nuances and appropriate contexts for using "they know nothing" can significantly enhance the clarity and impact of your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
they aren't aware
Focuses on a lack of awareness rather than a complete absence of knowledge.
they are ignorant
Emphasizes a lack of knowledge or information about a specific subject.
they are clueless
Implies a state of being uninformed or bewildered.
they haven't a clue
An idiomatic expression suggesting a complete lack of understanding.
they are uninformed
Highlights a lack of information, suggesting the possibility of being misinformed.
they are in the dark
Suggests a state of being kept unaware or uninformed about something.
they are oblivious
Implies a lack of awareness or attention to what is happening.
they haven't any knowledge
Directly states the absence of knowledge, but is more formal.
they fail to understand
Highlights a failure to comprehend, rather than a complete lack of knowledge.
they can't comprehend
Emphasizes an inability to grasp or understand something.
FAQs
How can I use "they know nothing" in a sentence?
You can use "they know nothing" to express that a group of people lacks knowledge or understanding about a particular subject. For example, "The critics claim to understand the film, but "they know nothing" about the director's vision."
What are some alternatives to "they know nothing"?
Alternatives include "they are unaware", "they are ignorant", or "they are clueless". The best choice depends on the specific context and the nuance you wish to convey.
Is "they know nothing" too informal for academic writing?
Yes, "they know nothing" can be too informal for academic writing. Consider using phrases like "they lack comprehensive understanding" or "their knowledge is limited" for a more appropriate tone.
What's the difference between "they know nothing" and "they understand nothing"?
"They know nothing" implies a complete absence of knowledge, while "they understand nothing" suggests a failure to comprehend existing information. The former is broader, while the latter focuses on comprehension.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested