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
highly doubtful that
Grammar usage guide and real-world examplesUSAGE SUMMARY
'highly doubtful that' is a correct and usable phrase in written English.
It is used to express an unlikely or unlikely outcome. For example: It is highly doubtful that the storm will pass before tomorrow morning.
✓ Grammatically correct
News & Media
Science
Formal & Business
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
It seems highly doubtful that they will stop now.
News & Media
"I'm highly doubtful that they know I paint my toenails".
News & Media
But in this cycle it's highly doubtful that they will help a Republican win the nomination.
News & Media
It is highly doubtful that people vote as their papers tell them, for instance.
News & Media
He added: It was highly doubtful that it was going to be effective.
News & Media
And it is highly doubtful that they will feel any more comfortable with Corbyn.
News & Media
It is highly doubtful that the senator would favor either of those outcomes.
News & Media
It did not take long to conclude that it was highly doubtful that any such transaction had ever taken place.
News & Media
Though it must be a consideration it is highly doubtful that it will result in a circulation boost.
News & Media
"I am highly doubtful that Medicare will benefit in any way from the rebates being offered to doctors".
News & Media
Torre said it was highly doubtful that he would activate Jason Giambi for the next round if Olerud is not ready.
News & Media
Expert writing Tips
Best practice
When using "highly doubtful that", ensure the context clearly indicates what outcome is being doubted. Avoid ambiguity by specifying the subject and action in question.
Common error
Avoid using "highly doubtful that" when a situation is merely uncertain or unconfirmed. This phrase implies a strong degree of disbelief, so reserve it for scenarios where there's substantial reason to expect something won't happen.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "highly doubtful that" functions as a modal expression, specifically indicating a strong degree of disbelief or skepticism regarding a proposition. Ludwig AI confirms this is a correct usage, as evidenced by the numerous examples provided.
Frequent in
News & Media
58%
Science
18%
Formal & Business
12%
Less common in
Encyclopedias
4%
Reference
4%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "highly doubtful that" is a grammatically sound and frequently used expression to convey skepticism or disbelief. As Ludwig AI confirms, it appears most commonly in "News & Media" sources, showcasing its prevalence in reporting uncertain or contested scenarios. When writing with this phrase, ensure you're expressing a significant level of doubt, not mere uncertainty. If the level of confidence in your statement is quite low, consider alternatives like "unlikely that" or "questionable whether", which are more understated. Ensure clear indication of what outcome is being doubted to prevent possible misunderstanding.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
it's unlikely that
A more direct and less emphatic way of expressing doubt.
very unlikely that
Emphasizes the improbability of something happening.
there's little chance that
Focuses on the minimal possibility of an event.
it is improbable that
More formal way of expressing doubt or disbelief.
it seems implausible that
Highlights the lack of plausibility or believability.
it is questionable whether
Highlights the uncertainty and lack of evidence.
I'm skeptical that
Expresses a critical or questioning attitude.
it's hard to believe that
Expresses a personal sense of incredulity.
I doubt very much that
Puts emphasis on the speaker's personal doubt.
it's a long shot that
Emphasizes the low probability of success.
FAQs
How can I use "highly doubtful that" in a sentence?
Use "highly doubtful that" to express strong disbelief or uncertainty about a particular outcome. For example, "It is "highly doubtful that" the project will be completed on time."
What are some alternatives to "highly doubtful that"?
Alternatives include "very unlikely that", "improbable that", or "questionable whether", depending on the nuance you want to convey.
Is it appropriate to use "highly doubtful that" in formal writing?
Yes, "highly doubtful that" is suitable for formal writing, especially when conveying a skeptical perspective based on evidence or reasoning. However, consider the tone and audience to ensure it aligns with the overall message.
What is the difference between "highly doubtful that" and "unlikely that"?
"Highly doubtful that" expresses a stronger sense of disbelief or improbability compared to simply "unlikely that". The former suggests a significant reason to doubt, while the latter merely indicates a low probability.
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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested