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
is uncertain whether
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'is uncertain whether' is correct and usable in written English.
You use it to describe a state of doubt, uncertainty, or hesitance. Example Sentence: It is uncertain whether the outcome of the election will be determined by tonight.
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(20)
is doubtful if
is not clear whether
remains to be seen if
is questionable whether
is yet to be determined if
is unconfirmed whether
is unsettled whether
is unpredictable whether
is equivocal whether
is obscure whether
is random whether
is unknown whether
is unfamiliar whether
is doubtful whether
is ambiguous whether
is vague whether
is undecided whether
is undetermined whether
is unsure whether
is uncertainty whether
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
57 human-written examples
It is uncertain whether Europe can cope.
News & Media
He is uncertain whether he will work again.
News & Media
It is uncertain whether the anti-poaching scheme was implemented.
News & Media
But he is uncertain whether they will manage.
News & Media
It is uncertain whether Arizona's economy will survive the exodus.
News & Media
It is uncertain whether any plotters are still alive.
News & Media
It is uncertain whether that plea will be accepted.
News & Media
It is uncertain whether her company can weather the storm.
News & Media
It is uncertain whether Sharon finally adopted this idea.
News & Media
It is uncertain whether Valla was a priest or not.
Encyclopedias
But it is uncertain whether the reprieve will last.
News & Media
Expert writing Tips
Best practice
When using "is uncertain whether", ensure that the context clearly indicates what the uncertainty pertains to. Providing specific details can help avoid ambiguity and make your statement more impactful.
Common error
Avoid embedding too many clauses within the sentence using "is uncertain whether". Overly complex sentences can become difficult to read and understand. Break down complex ideas into simpler statements for clarity.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is uncertain whether" functions as a hedge, which softens a statement by expressing doubt or tentativeness. As shown in Ludwig's examples, it introduces clauses where the truth or outcome is not yet known or confirmed. Ludwig AI indicates that this construction is correct and usable in written English.
Frequent in
News & Media
47%
Science
34%
Encyclopedias
5%
Less common in
Wiki
3%
Formal & Business
3%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "is uncertain whether" serves as a versatile linguistic tool for expressing doubt, speculation, or a lack of definite knowledge. Ludwig AI confirms that this phrase is correct and appropriate for use in written English. It is most frequently encountered in news and media, as well as scientific writing, where objectivity and hedging are valued. When using this phrase, it is important to clearly define the scope of uncertainty to maintain clarity and avoid ambiguity. The best practice is to ensure sufficient context is provided, while common errors involve overly complex sentence structures. Considering alternatives such as "is doubtful if" or "is not clear whether" can also enhance writing precision.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is doubtful if
Replaces "uncertain" with "doubtful", emphasizing skepticism regarding a condition.
is not clear whether
Focuses on the lack of clarity rather than uncertainty.
is questionable whether
Highlights the possibility of doubt or dispute surrounding the matter.
remains to be seen if
Indicates that the outcome is still pending and not yet determined.
is yet to be determined if
Similar to "remains to be seen", emphasizing the lack of a final decision.
is open to question whether
Suggests that the matter is debatable and not definitively resolved.
is debatable whether
Emphasizes the controversial nature of the issue.
is undetermined if
Highlights that the matter is still under consideration and has not been decided.
is unconfirmed whether
Focuses on the lack of verification or validation.
is speculative whether
Indicates that any conclusion would be based on conjecture rather than solid evidence.
FAQs
How can I use "is uncertain whether" in a sentence?
The phrase "is uncertain whether" is used to express doubt or a lack of definite knowledge about a situation or outcome. For example, "It "is uncertain whether" the game will be played due to the weather conditions".
What are some alternatives to "is uncertain whether"?
Alternatives include phrases like "is doubtful if", "is not clear whether", or "remains to be seen if", which all convey a sense of uncertainty or lack of clarity.
Is it better to use "is uncertain whether" or "is uncertain if"?
While both "is uncertain whether" and "is uncertain if" are commonly used, "is uncertain whether" is generally considered more grammatically correct, especially in formal writing. "Whether" explicitly indicates that there are two or more possibilities to consider.
What's the difference between "is uncertain whether" and "is unknown whether"?
"Is uncertain whether" suggests a lack of definite knowledge but implies that further investigation might reveal the answer. "Is unknown whether" indicates that the information is currently not known, without necessarily implying future discoverability. The choice depends on the context.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested