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
is most certainly not
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is most certainly not" is correct and usable in written English.
It can be used to emphasize a strong negation or disagreement with a statement or idea. Example: "The notion that hard work guarantees success is most certainly not true."
✓ Grammatically correct
News & Media
Science
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
"Jeff is most certainly not a special case.
News & Media
This year, that is most certainly not the case.
News & Media
A Korean philosopher thinks love is most certainly not the answer, at The Hankyoreh.
News & Media
Trump is most certainly not the right man to fill this void.
News & Media
Though the law is new, the frustration is most certainly not.
News & Media
But in any event it is most certainly not a subsidy.
News & Media
* - Name changed to protect the organizer, whose annual enterprise is most certainly not for entertainment purposes.
News & Media
That is most certainly not a national crisis requiring action from the government.
News & Media
As much to the point, it is most certainly not shared by many Tories.
News & Media
The idea is most certainly not dead, Levi replies, because nothing ever dies.
News & Media
And it is most certainly not designed to build a civilian society.
News & Media
Expert writing Tips
Best practice
When employing this phrase, consider the audience and context to ensure the level of emphasis is appropriate. Overuse can diminish its impact.
Common error
Avoid using "is most certainly not" when a simpler negation would suffice. Overusing emphatic phrases can make your writing sound unnatural or overly dramatic. Consider the impact on your writing. Using alternatives such as "is definitely not" or "is absolutely not" could improve the quality.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is most certainly not" functions as a strong negation or denial. According to Ludwig, this phrase is grammatically correct. Examples demonstrate its use in emphatically contradicting statements or ideas across various contexts.
Frequent in
News & Media
76%
Science
14%
Formal & Business
2%
Less common in
Academia
2%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, "is most certainly not" is a grammatically correct and very common phrase used to express strong negation or denial. Ludwig AI confirms its validity and usability. It appears most frequently in news and media contexts and serves to emphatically reject statements. While versatile, it's important to use it judiciously to avoid sounding overly dramatic. Consider alternatives like "is definitely not" or "is absolutely not" when a less emphatic tone is desired.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is definitely not
Replaces "most certainly" with "definitely", offering a slightly less formal tone.
is absolutely not
Substitutes "most certainly" with "absolutely", emphasizing the negation with a strong affirmative.
is certainly not
Removes "most", resulting in a direct and clear negation.
is by no means
Replaces the entire phrase with an idiom that indicates a strong denial or impossibility.
is far from
Indicates that something is not close to being the case, implying a significant difference.
is not at all
Emphasizes negation by adding "at all", suggesting a complete absence of something.
is out of the question
Expresses that something is not a possibility or an option, conveying a strong rejection.
is not under any circumstances
Specifies that something is not possible in any situation, highlighting the strength of the negation.
is simply not
Emphasizes the negation by adding "simply", suggesting that the idea is fundamentally incorrect.
cannot be
Uses a modal verb to express impossibility, offering a more direct and concise negation.
FAQs
How can I use "is most certainly not" in a sentence?
Use "is most certainly not" to strongly deny or contradict a statement. For example: "The rumor that I'm leaving the company "is most certainly not" true."
What are some alternatives to "is most certainly not"?
You can use alternatives like "is definitely not", "is absolutely not", or "is by no means" depending on the context.
Is it ever incorrect to use "is most certainly not"?
While grammatically correct, overuse of "is most certainly not" can make your writing sound unnatural. Reserve it for situations where you want to emphasize a strong negation.
What's the difference between "is certainly not" and "is most certainly not"?
Both phrases express negation, but "is most certainly not" adds extra emphasis. The inclusion of "most" amplifies the certainty and forcefulness of the denial compared to "is certainly not".
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