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
as doubtful as
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "as doubtful as" is correct and usable in written English.
It can be used to compare the level of doubt regarding two different subjects or situations. Example: "Her explanation was as doubtful as the claims made by the conspiracy theorists."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(20)
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
6 human-written examples
The future success of a united United Kingdom is as doubtful as, for example, the success of a more fully integrated EU.
News & Media
Paddy ready to fill Terry's moleskin trousers With Terry Wogan's future in the Eurovision Song Contest looking as doubtful as that of Dustin the Turkey, Ireland's singing glove puppet, attention turns to potential successors.
News & Media
In truth, I'm as doubtful as anyone.
News & Media
"It leaves Europe just as doubtful as before about Trump".
News & Media
And because that depends on concerted action by Ukraine's deeply divided ruling class, without a "third Maidan" to push them into action, that part of the equation looks just as doubtful as compliance with the Minsk agreement.
News & Media
Use of the Pearson reliability coefficient was rated as doubtful, as it neglects systematic observer bias [ 17].
Human-verified similar examples from authoritative sources
Similar Expressions
53 human-written examples
The only question is whether he's got the tools, which is as doubtful now as it was last Friday.
News & Media
Oh, no, I thought, here we go again, and I felt as locked-in and despairing, as doubtful of life's purpose, as any character in the film.
News & Media
Washington listed defensive end MARCO COLEMAN as doubtful and linebacker LaVAR ARRINGTON as questionable, although Coach MARTY SCHOTTENHEIMER did not sound very hopeful about Arrington on Wednesday.
News & Media
FAVRE LISTED AS DOUBTFUL Brett Favre was listed as doubtful on the injury report for Sunday but the Vikings interim coach, Leslie Frazier, declined Friday to elaborate on Favre's condition or say whether he had been cleared to play.
News & Media
In my dissent in Casey, I wrote that the "undue burden" test made law by the joint opinion created a standard that was "as doubtful in application as it is unprincipled in origin," "hopelessly unworkable in practice," "ultimately standardless".
News & Media
Expert writing Tips
Best practice
When using "as doubtful as", ensure the comparison is clear and that both subjects of the comparison are easily understood by the audience. This enhances the impact of your statement.
Common error
Avoid using "as doubtful as" without a clear point of reference for the comparison. Ensure the 'as' phrases are logically connected and easily understood, or the sentence may become confusing.
Source & Trust
85%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "as doubtful as" primarily functions as a comparative adjective phrase. It serves to equate the level of uncertainty or skepticism associated with two different subjects or situations. Ludwig identifies its usage in various contexts, reflecting its applicability in expressing relative doubt.
Frequent in
News & Media
60%
Science
28%
Encyclopedias
12%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "as doubtful as" is a comparative adjective phrase used to express an equivalent level of uncertainty or skepticism between two subjects. According to Ludwig, this phrase is grammatically sound and primarily used in News & Media, and also in science and encyclopedias. Its effectiveness lies in its ability to clearly convey a relative assessment of doubt. When using this phrase, ensure that the comparison is clear and logical to avoid confusion. While Ludwig identifies this phrase as usable in written English, it's essential to consider its context to prevent misinterpretation.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
equally uncertain as
Replaces "doubtful" with "uncertain", emphasizing a lack of certainty with a slightly different nuance.
just as questionable as
Substitutes "doubtful" with "questionable", highlighting that something is open to question or challenge.
as improbable as
Replaces "doubtful" with "improbable", focusing on the low likelihood of something happening or being true.
as dubious as
Employs "dubious" instead of "doubtful", suggesting a strong sense of suspicion or mistrust.
no more certain than
Offers a phrasing that highlights the lack of certainty rather than directly stating doubt.
as unlikely as
Focuses on the low probability of an event or statement being true, similar to "improbable".
as unreliable as
Shifts the focus to the lack of reliability, suggesting that something cannot be trusted or depended upon.
subject to similar doubts
This alternative highlights that something is exposed to the same uncertainties.
of comparable uncertainty
Emphasizes the equivalent level of uncertainty between two subjects.
similarly untrustworthy
Focuses on the lack of trustworthiness, indicating that two things are equally not to be trusted.
FAQs
How can I use "as doubtful as" in a sentence?
Use "as doubtful as" to compare the uncertainty of two different subjects. For example, "The chances of winning the lottery are "as doubtful as" finding a needle in a haystack".
What can I say instead of "as doubtful as"?
You can use alternatives like "equally uncertain as", "just as questionable as", or "as improbable as" depending on the context.
Is it better to use "as doubtful as" or "doubtful"?
"As doubtful as" is a comparative phrase used to equate the uncertainty of two subjects. "Doubtful" can simply express uncertainty about one subject, therefore there is no better phrase. The choice depends on the specific nuance you want to convey.
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
85%
Authority and reliability
3.8/5
Expert rating
Real-world application tested