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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
claim to know
Grammar usage guide and real-world examplesUSAGE SUMMARY
"claim to know" is correct and usable in written English.
You can use it when someone claims to have knowledge or insight on a certain topic. For example: "John is always claiming to know the best way to make coffee, but no one ever believes him."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
claims to know
profess to know
allege to know
pretend to know
maintain to know
assert to know
profess knowledge of
purport to know
presume to know
claim to discern
claim to acknowledge
claim to discover
required to know
claim to know how
demanded to know
claimed to know
calls to know
urged to know
demands to know
cases to know
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
60 human-written examples
My cousins would claim to know nothing.
News & Media
You claim to know something about us.
News & Media
I don't claim to know his heart.
News & Media
I don't claim to know the path to peace though.
News & Media
"I don't claim to know the absolute," he said.
News & Media
Nobody with a brain can claim to know that.
News & Media
Nor by MPs who claim to know what's going on.
News & Media
I don't claim to know the ethos of Wall Street".
News & Media
Few outside his inner circle would claim to know.
News & Media
A lot of people claim to know what they're doing.
News & Media
We should only claim to know what we know".
News & Media
Expert writing Tips
Best practice
Use "claim to know" when you want to express that someone is asserting knowledge, but you may doubt the validity of that knowledge. It's often used to introduce a degree of skepticism or questioning.
Common error
Avoid using "claim to know" in situations where there's no reason to doubt the person's knowledge. If the person genuinely possesses the knowledge, a more neutral verb like "knows" or "understands" would be more appropriate.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "claim to know" functions as a verb phrase, where 'claim' indicates an assertion, and 'to know' specifies the object of that assertion. Ludwig AI confirms that the phrase is both correct and widely used. Examples show it modifying statements, introducing a degree of skepticism.
Frequent in
News & Media
64%
Science
18%
Wiki
8%
Less common in
Encyclopedias
2%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, "claim to know" is a grammatically correct and very common verb phrase used to express that someone asserts they have knowledge of something, often with an undertone of doubt or questioning. As highlighted by Ludwig AI, it is usable in written English when you want to express that someone is asserting knowledge, but you may doubt the validity of that knowledge. The phrase is most frequently found in news and media sources, with a neutral register. Remember to use it judiciously, avoiding overuse in situations where the knowledge is genuine and undisputed. Consider using alternatives like "profess to know" or "allege to know" depending on the specific nuance you want to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
profess to know
Similar in meaning, but suggests a more formal or potentially deceptive assertion of knowledge.
allege to know
Emphasizes that the knowledge is asserted but not necessarily proven.
maintain to know
Highlights the persistence of the claim, even if doubted by others.
assert to know
Focuses on the forceful declaration of knowledge.
pretend to know
Implies that the knowledge is feigned or insincere.
profess knowledge of
A more formal way to express claiming knowledge.
purport to know
Suggests that the claim of knowledge is questionable or unverified.
deem to know
Indicates a judgment or opinion about one's own or another's knowledge.
presume to know
Suggests arrogance or overconfidence in one's knowledge.
believe to know
Expresses a belief, rather than a certainty, about possessing knowledge.
FAQs
How can I use "claim to know" in a sentence?
You can use "claim to know" when someone asserts knowledge about something, often with an implication that the knowledge may be questionable. For example, "He "claims to know" the solution, but I doubt it."
What are some alternatives to "claim to know"?
Depending on the context, you could use alternatives such as "profess to know", "allege to know", or "pretend to know".
Is it better to say "claims to know" or "claim to know"?
"Claims to know" is the third-person singular present tense form, used when the subject is singular (e.g., "He claims to know"). "Claim to know" is used with other subjects (e.g., "I claim to know", "They claim to know").
What's the nuance between "claim to know" and "know"?
"Claim to know" suggests an assertion of knowledge that may be disputed or unverified. "Know" simply indicates that someone possesses knowledge, without any implication of doubt. The choice depends on whether you want to express skepticism about the claimed knowledge.
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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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested