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 undoubtedly true
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is undoubtedly true" is correct and usable in written English.
You can use it to emphasize certainty or strong belief in the truth of a statement or fact. Example: "It is clear that climate change is undoubtedly true, given the overwhelming scientific evidence."
✓ 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
58 human-written examples
And this is undoubtedly true.
News & Media
At one level this is undoubtedly true.
News & Media
The church part is undoubtedly true.
News & Media
Some of this is undoubtedly true.
News & Media
This is undoubtedly true, and is actually quantifiable.
News & Media
This is undoubtedly true in an absolute sense.
News & Media
This is undoubtedly true; it's not 1964 anymore.
News & Media
This is undoubtedly true; catastrophe need not accompany global warming.
News & Media
In terms of research, technology and advances in surgery, the boast is undoubtedly true.
News & Media
It is undoubtedly true that modern-day communications can be a tyrant.
News & Media
It is undoubtedly true that Turner felt boundless admiration for Claude.
News & Media
Expert writing Tips
Best practice
When writing academic or persuasive content avoid overusing this phrase; it can come across as condescending or dismissive of alternative viewpoints.
Common error
While "is undoubtedly true" effectively conveys certainty, overuse can diminish its impact and make your writing sound repetitive. Vary your language to maintain reader engagement and avoid sounding overly assertive.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is undoubtedly true" functions as an emphatic assertion. It underscores the speaker's or writer's firm conviction in the veracity of a statement. As Ludwig highlights, this expression is used to convey certainty. Examples in Ludwig's data demonstrate its usage across diverse contexts, to strongly confirm the validity of an idea.
Frequent in
News & Media
74%
Science
19%
Formal & Business
7%
Less common in
Academia
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "is undoubtedly true" is a powerful tool for expressing certainty and reinforcing the validity of a statement. Ludwig's analysis indicates it functions as an emphatic assertion, predominantly used in news and media contexts. While grammatically correct and widely used, be mindful of overuse, especially in formal writing, to avoid diminishing its impact. As Ludwig AI confirms, this phrase is deemed correct and usable, serving to confidently convey a message, provided it aligns with factual evidence or well-supported claims.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is certainly true
Replaces "undoubtedly" with "certainly", offering a slightly less emphatic tone while still conveying strong assurance.
is undeniably true
Substitutes "undoubtedly" with "undeniably", emphasizing the impossibility of denying the truth of the statement.
is absolutely true
Uses "absolutely" in place of "undoubtedly" to convey a sense of complete and unconditional truth.
is unquestionably true
Employs "unquestionably" instead of "undoubtedly", highlighting that the truth is beyond any doubt or question.
is demonstrably true
Replaces "undoubtedly" with "demonstrably", suggesting that the truth can be proven or shown through evidence.
is patently true
Uses "patently" instead of "undoubtedly", indicating that the truth is obvious or evident.
is clearly true
Substitutes "undoubtedly" with "clearly", focusing on the ease with which the truth can be perceived.
there's no doubt that it's true
Expresses the same certainty but uses a more verbose and emphatic structure.
it's beyond question that it's true
Conveys the idea that the truth is so established that it cannot be challenged or doubted.
it goes without saying that it's true
Indicates that the truth is so obvious that it need not be explicitly stated.
FAQs
How can I use "is undoubtedly true" in a sentence?
Use "is undoubtedly true" to strongly affirm a statement, as in, "It "is undoubtedly true" that exercise benefits overall health".
What's a more formal alternative to "is undoubtedly true"?
For a more formal tone, consider phrases like "it "is indisputably true"" or "it "is demonstrably true"".
How does "is undoubtedly true" differ from "is probably true"?
"Is undoubtedly true" conveys a high degree of certainty, whereas "is probably true" indicates a likelihood or possibility, but not a definite truth.
Is it ever inappropriate to use "is undoubtedly true"?
Avoid using "is undoubtedly true" when discussing subjective opinions or unproven theories. It's best reserved for facts or statements supported by strong evidence.
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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
4.5/5
Expert rating
Real-world application tested