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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
is doubtless not
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is doubtless not" is correct and usable in written English.
It can be used to express certainty about the negation of a statement or idea. Example: "The solution to this problem is doubtless not as simple as it seems."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
2 human-written examples
But this is doubtless not the last of the Clinton campaign's dirty tricks.
News & Media
Audi is doubtless not blind to smog-choked Beijing's need for vehicles with zero tailpipe emissions, but nor are they going all-in with a pure battery-electric.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
He made his unbreakable bond with me – one he was doubtless not even aware of – on Saturday 11 July 1987.
News & Media
On the one hand, the sharp, direct New York profanity of 1970s dive bar punks Blondie, a group who were doubtless not strangers to such language.
News & Media
In any case, those who weren't scared off by either genre were doubtless not going to make a special trip to see Daniel Craig or Harrison Ford.
News & Media
Ike Turner was, doubtless, not all bad, but Tina's terse comment last week made a damning epitaph: 'Tina is aware that Ike passed away earlier today.
News & Media
Danton's support of the governmental policy of stabilization was doubtless not without ulterior motives, both personal and political; he was determined to save friends of his who had been arrested or who were in danger of arrest.
Encyclopedias
He almost certainly took pleasure, too — for this thought was doubtless not lost on him — in the idea that on any given day, slung unobtrusively over his shoulder, there might lurk a letter from one Great Power to another, filled with all the threats, blandishments and cunning hollow promises Diplomacy entails, awaiting delivery by its creator.
News & Media
"The motivation for this savage libel was doubtless not merely to undermine the security of the asylum Mr Berezovsky had been granted in 2003 – granted, I should add, over a well-found fear of political persecution in Russia – but also to muddy the waters of the murder investigation and deflect attention from what the programme itself called the Russian trail leading back to Moscow".
News & Media
We are doubtless not the only ones to point this out, but we did notice and point out to others that at least the Aczel theory has a perfectly obvious analogue of the cumulative hierarchy.
Science
Traditions and cultures are doubtless not fixed, being reinvented over time (Hobsbawm 1983).
Expert writing Tips
Best practice
Use "is doubtless not" to express a strong belief that something is not the case, especially when refuting an implied or stated assumption. For instance, "The solution is doubtless not as simple as it appears."
Common error
Avoid using "is doubtless not" in casual conversation or informal writing; opt for simpler alternatives like "is certainly not" or "is probably not" to maintain a natural tone.
Source & Trust
88%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is doubtless not" functions as an emphatic negation. It asserts with a high degree of confidence that something is not true. Ludwig AI confirms this use with examples from news sources, scientific publications, and encyclopedias.
Frequent in
News & Media
50%
Science
33%
Encyclopedias
17%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "is doubtless not" is a grammatically correct and usable expression that conveys a strong sense of certainty about the negation of a statement. According to Ludwig AI, while less common than simpler alternatives, it appears across various reputable sources like news outlets, encyclopedias, and scientific publications. When aiming for a more straightforward tone, consider alternatives like "is certainly not" or "is undoubtedly not". Avoid using it in overly casual or informal contexts to maintain a natural and appropriate style.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is certainly not
Replaces "doubtless" with "certainly", offering a slightly stronger sense of assurance.
is undoubtedly not
Substitutes "doubtless" with "undoubtedly", emphasizing the lack of doubt.
is assuredly not
Replaces "doubtless" with "assuredly", lending a more formal and emphatic tone.
is definitely not
Uses "definitely" instead of "doubtless", providing a clear and straightforward denial.
is absolutely not
Employs "absolutely" for "doubtless", intensifying the negation.
is clearly not
Replaces "doubtless" with "clearly", focusing on the evident nature of the negation.
is evidently not
Uses "evidently" in place of "doubtless", highlighting the apparent lack of truth.
is conceivably not
Uses "conceivably" in place of "doubtless", which means that can be imagined or believed.
is possibly not
Uses "possibly" in place of "doubtless", suggesting that it could be not true.
is perhaps not
Replaces "doubtless" with "perhaps", expressing a weaker degree of certainty.
FAQs
What does "is doubtless not" mean?
The phrase "is doubtless not" expresses a strong conviction that something is false or incorrect. It is a more emphatic way of saying something "is probably not" true.
How can I use "is doubtless not" in a sentence?
Use "is doubtless not" when you want to confidently assert that something is not the case. For example, "The path to success is doubtless not easy, but it is rewarding."
What are some alternatives to "is doubtless not"?
You can use alternatives such as "is certainly not", "is undoubtedly not", or "is definitely not" to convey a similar meaning with slightly different emphasis.
Is "is doubtless not" formal or informal?
"Is doubtless not" leans toward the formal side. In less formal contexts, phrases like ""is probably not"" or "is likely not" might be more appropriate.
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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
88%
Authority and reliability
4.3/5
Expert rating
Real-world application tested