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
unquestionable fact
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "unquestionable fact" is correct and usable in written English. You can use it when you want to emphasize that something is accepted as true without doubt. An example: "It is an unquestionable fact that the Earth orbits the Sun." Alternative expressions include "indisputable fact" and "undeniable fact."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Academia
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
5 human-written examples
The Supreme Court agrees, resisting evidence that a dog's power to smell and detect might be anything less than an unquestionable fact.
News & Media
"The comparatively total disappearance of the whale, in the Atlantic, is an unquestionable fact," a visitor to America noted in 1809.
News & Media
Fortunately, these lingering questions are secondary to one unquestionable fact this year.
News & Media
When people like Trump say they want to bring a return to "law and order," they are talking about a particular kind of order from a bygone era, one in which a white man's dominance in society was an unquestionable fact.
News & Media
Such assumptions have never been presented as a theory, even worse, that model was presented as an unquestionable fact.
Human-verified similar examples from authoritative sources
Similar Expressions
53 human-written examples
It's a world in which the views of the establishment are unquestionable facts, and a needlessly aggressive interview style masquerades as incisive journalistic scrutiny.
News & Media
The concept of existence identifies as basic and unquestionable the fact that something exists; to ask for a cause or explanation of there being something rather than nothing is to misunderstand the place of existence in the hierarchy of concepts.
Science
"It is undisputed and in fact unquestionable that the air pollution of (National Capital Territory NCTT, Delhi is getting worse with each passing day," it said.
News & Media
They don't miss the target even by a few centimetres … The fact is unquestionable.
News & Media
And that unquestionable matter of significant fact does give one pause.
News & Media
Operating since 2011, with more than 50% of its structural weight made of composites, the Boeing 787 Dreamliner is an unquestionable testimony to this fact.
Science
Expert writing Tips
Best practice
Place this phrase at the beginning of a paragraph to set an authoritative tone for the following evidence.
Common error
Avoid pairing the phrase with modifiers like "very" or "completely". Since a fact is already "unquestionable", adding further degrees of certainty results in a pleonasm that can make your writing feel cluttered or desperate to convince.
Source & Trust
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "unquestionable fact" functions as a nominal group where the adjective "unquestionable" acts as an emphatic modifier for the noun "fact". According to Ludwig AI, it serves to remove any ambiguity or room for skepticism in a statement.
Frequent in
News & Media
45%
Science
25%
Encyclopedias
15%
Less common in
Social Media
5%
Wiki
5%
Business
5%
Ludwig's WRAP-UP
The phrase "unquestionable fact" is a potent tool in English writing, confirmed by Ludwig AI as both grammatically correct and stylistically authoritative. It appears most frequently in high-stakes environments like scientific journals and elite news outlets, where establishing an objective reality is paramount. While it is highly effective for grounding an argument, writers should use it judiciously to avoid appearing overly aggressive or redundant. Alternatives such as "indisputable fact" or "undeniable fact" can provide variety without losing the core sense of absolute certainty. Ultimately, this phrase remains a gold standard for expressing truths that are beyond the reach of doubt.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
indisputable fact
Highly interchangeable, emphasizing that the fact cannot be argued against.
undeniable fact
Focuses on the impossibility of denying the truth of the statement.
irrefutable fact
Often used in scientific or legal contexts to show that evidence cannot be proven wrong.
incontrovertible fact
A more formal and academic alternative that suggests the matter is closed to discussion.
unquestioned fact
Suggests that the fact has not been challenged by anyone so far.
absolute fact
Adds a layer of intensity, suggesting the fact is fundamental and unchanging.
unassailable fact
Uses a defensive metaphor to imply the fact is immune to attack or doubt.
certain fact
A simpler, more direct way to express complete confidence in the information.
plain fact
Suggests the fact is so obvious that it requires no complex proof.
objective fact
Emphasizes that the truth exists independently of personal feelings or bias.
FAQs
What can I say instead of "unquestionable fact"?
You can use alternatives like "indisputable fact", "undeniable fact", or "irrefutable fact" depending on how formal you want to be.
Is it correct to say "unquestionable facts" in plural?
Yes, it is perfectly correct. For example, Ludwig shows usage in The Guardian: "It's a world in which the views of the establishment are "unquestionable facts"".
What is the difference between an "unquestionable fact" and an "undeniable truth"?
While often used interchangeably, a "fact" usually refers to an empirical, observable reality, whereas "undeniable truth" can refer to more abstract, moral, or philosophical concepts.
When is the phrase "unquestionable fact" most commonly used?
According to Ludwig AI, it is frequently used in high-level journalism and scientific literature to introduce data or historical events that are universally recognized as true.
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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
92%
Authority and reliability
4.9/5
Expert rating
Real-world application tested