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
that's undeniably true
Grammar usage guide and real-world examplesAlternative expressions(20)
that is undeniably true
that is certainly true
that is absolutely right
that's absolutely right
that much is clear
that is surely true
no argument there
that's definitely the case
that's certainly true
that is indeed so
you can bet on it
that's definitely right
that's spot on
that is entirely accurate
that's exactly right
that is accurate
you are absolutely correct
that is spot on
you're quite right
precisely so
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
So he decides to answer every question with a statement that's undeniably true: "The Earth is round".
News & Media
That's undeniably true, in the same way that American frontier history was not like a spaghetti western, either.
News & Media
And while that's undeniably true, an alternate interpretation suggests a negative connotation.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
In terms of the importance of John Paul's intersection with world events, that is undeniably true.
News & Media
Although there is plenty here for infidels to argue with, there is much more that is undeniably true and important to know, if you want to understand the complex histories of both present-day religion and atheism.
News & Media
And of the information that is undeniably true, what does that show you about who he was?" Yeah.
News & Media
In life there are few things that are undeniably true but here's one: Nobody can out-party a drag queen.
News & Media
That is undeniably true.
News & Media
When One Direction tell the press that they owe everything to their fans, the only surprising part is that it's undeniably true.
News & Media
All that said, it's undeniably true that the British upper class have been masterful in maintaining their privileges over the centuries.
News & Media
Even if that's an exaggeration, it's undeniably true that a bunch of small businesses will fail.
News & Media
Expert writing Tips
Best practice
Reserve this expression for points that are genuinely supported by evidence or common consensus to maintain your professional credibility.
Common error
Avoid using this phrase to validate personal feelings or controversial opinions that lack empirical backing, as it can make the speaker sound dogmatic or intellectually dishonest.
Source & Trust
89%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
In the examples provided by Ludwig, the phrase functions as a declarative clause fragment that serves to emphatically validate a preceding statement. It typically acts as a hinge in discourse, allowing the speaker to concede a point before pivoting to a new perspective.
Frequent in
News & Media
75%
Science
15%
Formal & Business
10%
Less common in
Encyclopedias
5%
Wiki
3%
Social Media
2%
Ludwig's WRAP-UP
The phrase "that's undeniably true" is a high-impact linguistic tool used to concede or confirm factual accuracy with absolute certainty. According to Ludwig, it appears most frequently in high-quality journalism and scientific discourse, suggesting a strong association with evidence-based reasoning. Whether used to acknowledge a counter-argument or to bolster a claim, it signals intellectual honesty. Writers should be mindful of the difference between "that's" and "that is" to match the level of formality required, but the core effectiveness of the phrase remains its ability to close the door on doubt.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
it is undeniably the case
Shifts the focus from a specific statement to the general state of reality.
that is demonstrably correct
Implies the truth can be proven through evidence or logical demonstration.
it's objectively factual
Uses more clinical language to emphasize neutrality and evidence.
that's an indisputable fact
Transforms the observation into a noun phrase for stronger finality.
that is certainly accurate
Slightly less intense than undeniably but maintains high certainty.
it is strictly true
Emphasizes that the statement holds up even under precise scrutiny.
that stands as a truth
Adds a slightly more literary or oratorical tone to the acknowledgement.
it is empirically valid
Specifically suggests that the truth is based on observation or data.
that is beyond question
Focuses on the lack of doubt rather than the nature of the truth itself.
that is clearly the reality
Uses more plain language to point out the obvious nature of the fact.
FAQs
How do I use "that's undeniably true" in a sentence?
You can use it as a standalone response or as a concessive clause, for example: "While "that's undeniably true" in some cases, the broader trend suggests otherwise."
What can I say instead of "that's undeniably true"?
Depending on the tone you want, you can use alternatives like "it's objectively the case", "that is certainly accurate", or "it's an indisputable fact".
Is it better to use "that's" or "it's"?
Both are correct, but ""that's undeniably true"" specifically refers to something previously mentioned by another person, whereas "it's undeniably true" can refer to a general concept.
Is the phrase formal enough for business writing?
Yes, though in very formal documents, you should expand the contraction to "that is undeniably true" to maintain a professional register.
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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
89%
Authority and reliability
4.8/5
Expert rating
Real-world application tested