Used and loved by millions
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
certain fact
Grammar usage guide and real-world examplesUSAGE SUMMARY
"certain fact" is grammatically correct and can be used in written English.
You can use this phrase to refer to something that is known to be true. For example, "It is a certain fact that the Earth revolves around the sun."
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(20)
undeniable truth
established fact
known fact
indisputable fact
irrefutable truth
definite certainty
unquestionable reality
proven fact
sure thing
certain essence
certain satisfaction
precise fact
definite fact
occasional fact
accurate fact
inevitable fact
certain statement
certain effect
certain appreciation
real fact
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
29 human-written examples
Sometimes a certain fact is crucial; sometimes it is irrelevant.
News & Media
Put 10 national security officials in a room to discuss declassifying a certain fact.
News & Media
So he cannot report it as a certain fact in the present tense.
News & Media
Its publication at this time gains a certain interest from the certain fact that it coincided with the celebration of Mr. Edison's invention of the incandescent bulb.
News & Media
Writer visited Landon in Vienna and took a trip with him to Eisenstadt where, at the Haydn Museum, he checked a certain fact in a Haydn manuscript.
News & Media
When we say we are sure about a certain fact, for example, we may well be right only half the time.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
31 human-written examples
Certain facts are undisputed.
Academia
Certain facts remain solid.
News & Media
The unembroidered, certain facts are scanty.
Encyclopedias
"We do know certain facts," I offered.
News & Media
Certain facts can be established.
News & Media
Expert writing Tips
Best practice
When using "certain fact", ensure that the information you are presenting is indeed widely accepted and supported by evidence. Avoid using it for opinions or unverified claims.
Common error
Avoid using "certain fact" when the information is only probable or based on limited evidence. Using it inappropriately can damage your credibility.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "certain fact" functions as a noun phrase where the adjective 'certain' modifies the noun 'fact'. It is used to emphasize the indisputable and well-established nature of the information being presented, as confirmed by Ludwig AI.
Frequent in
News & Media
45%
Science
30%
Academia
15%
Less common in
Formal & Business
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
The phrase "certain fact" is a grammatically correct and frequently used construction to emphasize the undeniable truth of a statement. Ludwig AI confirms its correct usage and prevalence across diverse domains like News & Media, Science, and Academia. While highly versatile, it’s crucial to ensure that the information presented as a "certain fact" is, in reality, supported by solid evidence to maintain credibility. Alternatives like "undeniable truth" or "established fact" can be employed for stylistic variation or to better suit the specific context. Avoiding overuse and ensuring factual accuracy will maximize the effectiveness of this phrase in conveying conviction and certainty.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
undeniable truth
Replaces "fact" with "truth", emphasizing the indisputable nature of the information.
established fact
Highlights that the fact has been confirmed or proven.
indisputable fact
Similar to "undeniable truth", stressing the impossibility of arguing against the fact.
irrefutable truth
Emphasizes that the truth cannot be disproven.
known fact
Highlights the widespread knowledge of the fact.
definite certainty
Uses a noun to convey conviction rather than a adjective modifying a noun.
unquestionable reality
Substitutes "fact" with "reality", focusing on the factual nature of the state of being.
proven fact
Highlights that the fact has been confirmed or demonstrated with evidence.
sure thing
Less formal, indicating a guaranteed or reliable outcome or piece of information.
uncontested reality
Focuses on the consensus surrounding the reality of the statement.
FAQs
How can I use "certain fact" in a sentence?
You can use "certain fact" to introduce information that is known to be true and supported by evidence. For example: "It is a "certain fact" that exercise is beneficial for health."
What are some alternatives to saying "certain fact"?
You can use alternatives such as "undeniable truth", "established fact", or "known fact" depending on the context.
Is it redundant to say "true fact" instead of "certain fact"?
While "true fact" isn't inherently wrong, it can be seen as slightly redundant since a fact is generally understood to be true. "Certain fact" emphasizes the confirmed and indisputable nature of the information.
Can "certain fact" be used for future predictions?
Generally, "certain fact" is used for things that are already known or proven. It's less appropriate for future predictions unless those predictions are based on extremely reliable data and are virtually guaranteed.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested