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
indubitably is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "indubitably is" is correct and usable in written English. You can use it to emphasize certainty or agreement in a statement. Example: "The solution to the problem, indubitably, is effective." Alternative expressions include "undoubtedly is," "certainly is," and "definitely is."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
certainly is
it is undeniably
it is plainly
it is patently obvious
absolutely correct
furthermore it is
however it is
it assuredly is
genuinely it is
it is indeed
that is definitely the case
that is undoubtedly true
it is precisely
it is doubtless
it is undoubtedly
precisely so
it is quite
that is absolutely correct
i couldn't agree more
definitely it is
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
3 human-written examples
Until Blair resolves the European issue, one way or the other, he cannot really claim to be a great Prime Minister — as opposed to a great politician, which he indubitably is.
News & Media
The level of hypocrisy achieved by "Love," a not only offensive but also incompetent play by David S. Rosenthal, is astonishing and in my experience unmatched -- even by the egregious standards of vanity productions, which this indubitably is.
News & Media
But while Brown and the Labour Party certainly deserve some purgatory for failing to win this election outright -- the vast British public -- as incorrigibly stupid as a large part of it indubitably is -- doesn't deserve the venal price it will pay if the Conservative Party gains power.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
Intelligent as he indubitably was, Kenner was no highbrow purist.
News & Media
Müller is the third man in this equation, but the German was never the player that Pelé indubitably was, or that Messi is becoming.
News & Media
Frozen peas, indubitably, are as good as fresh (does anyone want to dubitate that?) But some things, like soft fruit, will never survive freezing, or, more important, thawing.
News & Media
His voice has a thrilling edge, and he colours his lines with delicate artistry, yet his approach is as natural as conversation, never going for effects for their own sake, or inflating the importance of trifles which some of these songs indubitably are.
News & Media
What could, indubitably, be of enormous benefit in the long term is the establishment of an international committee on transplantation in refugees.
Science
The platform chosen for the present analysis, differently from others based upon CGH or re-sequencing techniques, is not suited for addressing the study of such variations, which were at this point beyond the scope of the present work, even though they might indubitably be relevant for a closer investigation on the molecular nature of the introgressed QTL.
Science
Indubitably, he is a handsome man, an exemplary ballet dancer.
News & Media
Indubitably, hypertension is an important worldwide public-health challenge.
Science
Expert writing Tips
Best practice
Consider your audience when using "indubitably is". While it adds a touch of sophistication, ensure it aligns with the overall tone and register of your piece. In more casual contexts, simpler alternatives like "certainly is" or "definitely is" might be more appropriate.
Common error
Avoid using "indubitably is" in casual conversations or informal writing. Its formal tone can sound unnatural or even pretentious in settings that call for a more relaxed style. Choose simpler synonyms to maintain a comfortable and relatable tone.
Source & Trust
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "indubitably is" functions as an emphatic affirmation, strengthening a statement by asserting its undeniable truth. Ludwig AI confirms this use cases providing reliable and contextualized examples.
Frequent in
News & Media
46%
Science
33%
Formal & Business
11%
Less common in
Encyclopedias
5%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "indubitably is" functions as a strong affirmation, lending an air of certainty and sophistication to statements. Ludwig AI confirms that it is grammatically correct and most commonly found in formal contexts, such as news media and scientific publications. While effective for emphasis, it should be used judiciously to avoid sounding pretentious in informal settings. Consider alternatives like "certainly is" or "undoubtedly is" for broader applicability.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
certainly is
Uses a more common synonym for "indubitably", maintaining a similar level of formality.
undoubtedly is
Replaces "indubitably" with another strong synonym, keeping the meaning almost identical.
unquestionably is
Substitutes "indubitably" with a synonym that emphasizes the lack of any question or doubt.
definitely is
Employs a more informal synonym for "indubitably", reducing the level of formality.
without a doubt is
Replaces the adverb with a prepositional phrase expressing the same certainty.
it is undeniably
Rearranges the sentence to place emphasis on the undeniable nature of the statement.
assuredly is
Uses a less common synonym, keeping the formal tone.
it is patently
This alternative phrases provides the idea of obviousness by using "patently".
it is plainly
Uses "plainly" instead of "indubitably", suggesting that the statement is clear and obvious.
truly is
Replaces "indubitably" with "truly", conveying sincerity but at a lower level of formality.
FAQs
How can I use "indubitably is" in a sentence?
Use "indubitably is" to express certainty or agreement. For example, "The best solution, "indubitably is" to invest in new technology."
What phrases are similar to "indubitably is"?
You can use alternatives like "certainly is", "undoubtedly is", or "definitely is" depending on the context and desired level of formality.
When is it appropriate to use "indubitably is"?
It is appropriate to use "indubitably is" in formal writing or when you want to emphasize the certainty of a statement. It adds a sophisticated tone but should be used judiciously.
What is the difference between "indubitably is" and "probably is"?
"Indubitably is" expresses a higher degree of certainty than "probably is". While "indubitably" suggests something is beyond doubt, "probably" indicates a likelihood but not a guarantee.
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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
4.1/5
Expert rating
Real-world application tested