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
doubt as to
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "doubt as to" is correct and usable in written English.
You can use it when you have uncertainty or lack of faith or trust in something, or when you are uncertain about something. For example: "We had some doubt as to whether we should take the risk," or "He had no doubt as to the outcome of the election."
✓ Grammatically correct
Academia
News & Media
Encyclopedias
Alternative expressions(20)
uncertainty regarding
reservations about
skepticism concerning
no doubt that
questions about
misgivings regarding
apprehension about
skepticism as to
difficulty as to
suspense as to
insurance as to
suspicion as to
uncertainty as to
probability as to
hesitation as to
confusion as to
contest as to
likelihood as to
misunderstanding as to
reservation as to
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
I am not prepared to indicate doubt as to the essential validity of Shapiro.
Academia
Is there any doubt as to how this will end?
News & Media
There remained a reasonable doubt as to these boys' guilt.
News & Media
But Vieira was in no doubt as to the solution.
News & Media
At least there is much room for doubt as to what counsel actually intended.
Academia
The explicit language of that act leaves no doubt as to its object.
Academia
But is the language so clear that there is no doubt as to the construction?
Academia
There thus remains no doubt as to what the Rule commands.
Academia
Nevertheless, both coaches are in no doubt as to the value of tomorrow's Test.
News & Media
There was some doubt as to whether he was a leper or not.
News & Media
There is little doubt as to whom they wish to take the country back from.
News & Media
Expert writing Tips
Best practice
When using "doubt as to", ensure the subject of your doubt is clearly identified to avoid ambiguity. For instance, instead of saying "There is doubt as to the decision", specify "There is doubt as to whether the decision was correct."
Common error
Avoid using "doubt as to" with overly broad or unclear references. Saying "There's doubt as to things" is vague. Be specific: "There's doubt as to the project's feasibility".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "doubt as to" functions as a prepositional phrase, typically used to introduce the object of the doubt. It often modifies a noun or verb, specifying what exactly is being questioned or regarded with uncertainty. Ludwig provides numerous examples illustrating its use in various contexts.
Frequent in
News & Media
35%
Academia
25%
Encyclopedias
15%
Less common in
Science
10%
Wiki
5%
Formal & Business
5%
Ludwig's WRAP-UP
In summary, "doubt as to" is a versatile prepositional phrase used to express uncertainty or skepticism. As Ludwig AI confirms, the phrase is grammatically correct and commonly used in written English. It appears frequently in news, academic, and encyclopedia sources, indicating its suitability for both formal and neutral contexts. When using the phrase, clarity is crucial; ensure the subject of your doubt is clearly defined to avoid vagueness. While alternatives like "uncertainty regarding" and "reservations about" exist, "doubt as to" remains a reliable choice for expressing measured uncertainty.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
uncertainty regarding
Replaces "doubt" with "uncertainty" and "as to" with "regarding", maintaining a formal tone but altering the specific wording.
reservations about
Substitutes "doubt" with "reservations", implying a hesitation or concern rather than outright disbelief.
skepticism concerning
Replaces "doubt" with "skepticism" and "as to" with "concerning", suggesting a more critical and questioning attitude.
questions about
Uses "questions" instead of "doubt", indicating a need for clarification or further information.
misgivings regarding
Employs "misgivings" to convey a sense of unease or apprehension about something.
apprehension about
Similar to "misgivings", but with a stronger emphasis on fear or anxiety.
lack of certainty about
Rephrases the concept of doubt as an absence of certainty, providing a more explicit explanation.
some hesitation concerning
Highlights the hesitant aspect of doubt, suggesting a pause or reluctance.
ambivalence toward
Indicates a mixed feeling or contradictory ideas about something.
disbelief in
Expresses a stronger level of doubt, implying a refusal to accept or believe something.
FAQs
How can I use "doubt as to" in a sentence?
You can use "doubt as to" to express uncertainty about something. For example, "There is some "doubt as to" whether the project will succeed" or "The experts expressed "doubt as to" the accuracy of the data".
What are some alternatives to "doubt as to"?
Alternatives include "uncertainty regarding", "reservations about", or "skepticism concerning" depending on the specific nuance you want to convey.
Is it more formal to use "doubt as to" or "doubt about"?
"Doubt as to" generally carries a slightly more formal tone compared to "doubt about". Both are acceptable, but "doubt as to" might be preferred in academic or professional writing.
What's the difference between "doubt as to" and "no doubt that"?
"Doubt as to" implies uncertainty, while "no doubt that" expresses certainty. For instance, "There is "doubt as to" the accuracy of the report" means there's uncertainty, whereas "There is "no doubt that" the report is accurate" means it's considered certainly accurate.
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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested