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Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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claim to know

Grammar usage guide and real-world examples

USAGE 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

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

My cousins would claim to know nothing.

News & Media

The New York Times

You claim to know something about us.

News & Media

The New Yorker

I don't claim to know his heart.

News & Media

The New York Times

I don't claim to know the path to peace though.

News & Media

Independent

"I don't claim to know the absolute," he said.

News & Media

The New York Times

Nobody with a brain can claim to know that.

News & Media

The New York Times

Nor by MPs who claim to know what's going on.

News & Media

The Guardian

I don't claim to know the ethos of Wall Street".

News & Media

The New York Times

Few outside his inner circle would claim to know.

News & Media

The Guardian

A lot of people claim to know what they're doing.

We should only claim to know what we know".

News & Media

The New York Times
Show more...

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.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

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.

Expression frequency: Very common

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.

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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Source & Trust

84%

Authority and reliability

4.5/5

Expert rating

Real-world application tested

Most frequent sentences: