is known that

USAGE SUMMARY

The phrase "is known that" is not correct in standard written English.
It is typically used in contexts where one is referring to widely accepted information or facts, but it should be rephrased for clarity. Example: "It is known that exercise is beneficial for mental health."

⚠ May contain grammatical issues

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

However, it is known that vaccine immunity wears off.

The Guardian

It is known that is nonexpansive.

Journal of Inequalities and Applications

It is known that he was beaten.

The New York Times

It is known that Ripken loves basketball.

The New York Times - Sports

It is known that extrapolation often leads to numerical instability.

Journal of Computational Physics

It is known that ΔR generates an analytic contraction semigroup.

Journal of Functional Analysis

It is known that the girl had caught scarlet fever.

The Guardian

It is known that about 50% of endometriosis is inherited.

The Guardian

It is known that some cabinet ministers are wary.

The Guardian

"It is known that Cardinal Bergoglio liked cooking himself.

The Guardian

It is known that pIgR mediates transcytosis of IgA9.

Nature

Expert writing Tips

Best practice

Replace "is known that" with stronger, more precise phrases like "it is established that" or "studies show that" to add clarity and authority to your writing.

Common error

Avoid using "is known that" excessively, as it can make your writing sound passive and less engaging. Instead, opt for active constructions that clearly attribute the knowledge to a source or actor.

Linguistic Context

The phrase "is known that" functions as an introductory clause to present information that is supposedly already established or accepted. However, Ludwig AI marks the phrase as grammatically incorrect, suggesting stronger alternatives for clarity and authority.

Expression frequency: Very common

Frequent in

Science

59%

News & Media

35%

Formal & Business

3%

Less common in

Encyclopedias

0%

Wiki

2%

Reference

1%

Ludwig's WRAP-UP

While the phrase "is known that" is frequently used, Ludwig AI identifies it as grammatically incorrect, suggesting clearer and more authoritative alternatives. Its purpose is to introduce a statement as a supposedly accepted fact, commonly found in scientific and news-related contexts. To enhance writing, replace "is known that" with stronger phrases like "it is established that" or "studies show that". This makes your writing more direct, authoritative, and less passive. Be mindful of the context to make the most relevant word choice.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

it is established that

Emphasizes the formal and confirmed nature of the information.

it is recognized that

Highlights the acknowledgement and acceptance of the information.

it is understood that

Focuses on the comprehension and agreement regarding the information.

it is well-known that

Stresses the widespread knowledge of the information.

it is common knowledge that

Indicates the information is generally known by most people.

it is accepted that

Highlights the widespread agreement and validation of the information.

it is a given that

Suggests the information is a fundamental assumption.

everyone knows that

Implies a broad awareness of the information, potentially more informal.

studies show that

Attributes the information to research findings, adding a layer of evidence.

research indicates that

Links the information to research, providing a scientific basis.

FAQs

What phrases can I use instead of "is known that"?

Alternatives include "it is established that", "it is recognized that", or "it is well-known that", depending on the specific context.

Is "is known that" grammatically correct?

While commonly used, the phrase "is known that" can be considered grammatically weak. Stronger alternatives provide more clarity and precision.

How can I make my writing sound more authoritative than using "is known that"?

Use phrases like "research indicates that" or "studies show that" to ground your statements in evidence. Avoid being overly passive, as well.

What's the difference between "is known that" and "it is widely recognized that"?

"It is widely recognized that" is more emphatic and highlights broad acceptance. "Is known that", while common, can lack this emphasis and may benefit from stronger phrasing.