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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
it is not certain
Grammar usage guide and real-world examplesUSAGE SUMMARY
"it is not certain" is a correct and usable phrase in written English.
You can use it when something is uncertain or unclear. For example, "It is not certain whether the new policy will improve the company's profits."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
While TAAR1 is inactivated in dogs, it is not certain that its function has been lost.
Science
It is not certain where the garden had its beginnings.
News & Media
It is not certain.
News & Media
It is not certain to win.
News & Media
It is not certain it will succeed.
News & Media
But it is not certain they will.
News & Media
But it is not certain that it would.
It is not certain when it would happen.
News & Media
It is not certain that they will next time.
News & Media
It is not certain Canada would agree to that.
News & Media
It is not certain that any now do.
News & Media
Expert writing Tips
Best practice
When conveying uncertainty, use "it is not certain" to introduce a statement and follow it with a clear explanation of what is uncertain and why. This adds clarity and context for the reader.
Common error
Avoid overuse of passive constructions with "it is not certain". While grammatically correct, excessively relying on passive voice can make your writing sound weak. Instead, consider rephrasing to use a more direct and active construction where appropriate.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it is not certain" functions as a hedge or qualifier, expressing a lack of definitive knowledge or assurance. It is commonly used to introduce a statement where the speaker or writer wishes to avoid making an absolute claim. This is supported by Ludwig AI, which confirms its correct usage. Many examples across various sources illustrate this function.
Frequent in
News & Media
60%
Science
23%
Encyclopedias
5%
Less common in
Wiki
3%
Formal & Business
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "it is not certain" is a grammatically sound and highly versatile phrase used to express uncertainty across a spectrum of contexts. Ludwig AI validates its correctness and widespread applicability. Predominantly found in News & Media and Scientific domains, its neutral register makes it suitable for both formal and informal communication. When employing this phrase, clarity is key: explicitly stating what remains uncertain enhances the effectiveness of your communication. Although "it is not certain" is correct, consider a more direct and active construction to avoid overusing passive voice and improve the overall strength of your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
it is not definite
Replaces "certain" with "definite", indicating a lack of assuredness.
it is not guaranteed
Emphasizes that an outcome is not assured or promised.
it is not sure
Uses "sure" instead of "certain", providing a more informal tone while retaining the meaning.
it remains to be seen
Suggests that the outcome will only be known in the future.
the outcome is uncertain
Focuses on the uncertainty of the result rather than the lack of certainty.
it is open to question
Indicates that something is debatable or not yet resolved.
it is doubtful
Expresses a stronger degree of skepticism about a particular outcome.
it is questionable
Similar to doubtful, suggesting that something is unlikely or unreliable.
it is up in the air
An idiomatic expression meaning that something is unresolved or undecided.
it is contingent
Implies that something depends on other factors or conditions.
FAQs
What does "it is not certain" mean?
The phrase "it is not certain" indicates a state of uncertainty or doubt about a particular outcome, fact, or event. It suggests that the truth or the future is unknown or unpredictable.
How can I use "it is not certain" in a sentence?
You can use "it is not certain" to introduce a statement where you want to express doubt or a lack of definite knowledge. For example, "It is not certain if the project will be completed on time."
What are some alternatives to "it is not certain"?
Alternatives to "it is not certain" include phrases like "it is not definite", "it is not sure", or "the outcome is uncertain". These options offer similar meanings but can vary slightly in tone or emphasis.
Is there a difference between "it is not certain" and "it is uncertain"?
While similar, "it is not certain" focuses on the lack of certitude, whereas "it is uncertain" emphasizes the state of being unpredictable or unknown. The choice depends on the specific nuance you want to convey.
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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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested