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
completely uncertain if
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "completely uncertain if" is correct and usable in written English.
It can be used when expressing doubt or lack of clarity about a situation or outcome. Example: "I am completely uncertain if we will meet the deadline for the project."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
"I went completely uncertain that I would return," he continues.
News & Media
And all that, while he is completely uncertain that he will even measure anything resembling a quake.
The last few hectic days have left her relieved and happy, she says, but completely uncertain as to her future.
News & Media
This concerns tumors which are completely "uncertain" as whether they are malignant or benign in sonographic assessment.
The future's completely uncertain".
News & Media
Going backward means a life on the barricades in which the future of both peoples is completely uncertain.
News & Media
When two photons are entangled, the state of each photon is completely uncertain but the two states are correlated.
Science & Research
Even weirder, two electrons can be entangled so the spin of each electron is completely uncertain, but the two spins are completely locked together and correlated.
Science & Research
Amount of production of all products in every period is not clear and depends on demand which is completely uncertain.
Within this strip, the response is almost completely uncertain.
Science
The official said the authorities were uncertain if the plots were linked in one grand scheme or if they were completely separate.
News & Media
Expert writing Tips
Best practice
When using "completely uncertain if", ensure that the context clearly indicates the condition or outcome that is uncertain. This helps to avoid ambiguity and ensures the reader understands the specific area of doubt.
Common error
Avoid using "completely uncertain if" when a lesser degree of uncertainty is intended. Using stronger language than necessary can make your writing sound hyperbolic or less credible. Choose words that accurately reflect the level of doubt.
Source & Trust
60%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "completely uncertain if" functions as a conditional expression of uncertainty. It introduces a scenario where the outcome or truth of a statement is entirely unknown. As Ludwig AI explains, it expresses doubt about a situation or outcome.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "completely uncertain if" is used to express total doubt about a condition or outcome. As Ludwig AI confirms, the phrase is grammatically correct and usable in written English. Due to the limited number of examples, its frequency is considered missing, and it can be found in various types of writing and speech. Remember to use this phrase when you want to clearly communicate that a situation is entirely unpredictable. Alternatives such as "totally unsure whether" or "entirely doubtful if" can provide subtle variations in tone and emphasis.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
totally unsure whether
Changes "completely uncertain" to "totally unsure", offering a slight variation in the strength of uncertainty, while using "whether" instead of "if".
entirely doubtful if
Replaces "completely uncertain" with "entirely doubtful", suggesting a stronger sense of disbelief or skepticism.
not sure whether
Simplifies "completely uncertain" to "not sure", reducing the emphasis on the extent of uncertainty.
unsure if
Shortens "completely uncertain" to "unsure", offering a more concise expression of uncertainty.
doubtful whether
Substitutes "completely uncertain" with "doubtful", indicating a state of uncertainty coupled with a degree of disbelief.
questionable if
Replaces "completely uncertain" with "questionable", implying that the truth or validity of something is uncertain or open to doubt.
dubious if
Similar to questionable, "dubious" suggests uncertainty with a hint of suspicion or distrust.
unclear whether
Focuses on the lack of clarity rather than the feeling of uncertainty.
iffy if
Uses the informal term "iffy" to convey uncertainty or doubt about a condition.
up in the air if
Expresses uncertainty by indicating that the outcome or condition is still undecided or unresolved.
FAQs
How can I rephrase "completely uncertain if" to sound more formal?
For a more formal tone, consider using phrases such as "entirely doubtful whether", "substantially uncertain whether", or "highly questionable if". These alternatives offer a more sophisticated and precise way to express uncertainty.
Is it better to use "if" or "whether" after "completely uncertain"?
While both "if" and "whether" can follow "completely uncertain", "whether" is generally preferred in formal writing when expressing a choice or alternative. Using "whether" often provides greater clarity and precision in these contexts.
What does "completely uncertain if" imply in a sentence?
Using "completely uncertain if" in a sentence indicates a state of total doubt or lack of knowledge regarding a specific condition or outcome. It conveys that there is no reliable basis for predicting or determining what will happen.
Are there situations where "completely uncertain if" might be too strong of a statement?
Yes, in contexts where there is only a moderate degree of doubt, using "completely uncertain if" can be an overstatement. In such cases, softer alternatives like "somewhat uncertain if" or "not entirely sure whether" might be more appropriate.
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
60%
Authority and reliability
3.8/5
Expert rating
Real-world application tested