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
it is proved
Grammar usage guide and real-world examplesUSAGE SUMMARY
"it is proved" is a correct and usable phrase in written English.
It is often used to indicate that the truth of something has been verified. For example: "It is proved that humans evolved from a common ancestor."
✓ Grammatically correct
Science
News & Media
Alternative expressions(20)
it has been demonstrated
it has been verified
the evidence shows
it is demonstrated
it is established
it is confirmed
the results indicate
it is substantiated
it is perceived
it is proven
it is evidenced
it is corroborated
it is provided
it is observed
it is approved
it is revealed
it is suggested
it is prepared
it is received
it is represented
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
It is proved that this Fisher information takes its minimum for the case of constant temperature.
Science
Quod erat demonstrandum: Thus it is proved.
News & Media
So even if it is proved effective, a mask may not be very practical.
News & Media
Duck l'orange, ubiquitous as it is, proved to be one of the better entrees.
News & Media
It is proved by induction.
It is proved that if.
Science
It is proved similar to Theorem (4.17).□.□
Science
It is proved that the interpolation is stable.
It is proved that the biological system is minimum phase.
It is proved that the problem is NP-hard.
Science
It is proved that the tracking error is asymptotically minimized.
Science
Expert writing Tips
Best practice
Use "it is proved" when you want to emphasize that something has been rigorously demonstrated through evidence or logical argument. Ensure that the context clearly indicates what the 'it' refers to and what evidence supports the claim.
Common error
While "it is proved" is grammatically sound, overuse of passive voice can make writing sound indirect. Consider using active voice where appropriate to make your writing more dynamic and engaging. For instance, instead of "It is proved that X causes Y", you could say "The research proves that X causes Y."
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it is proved" functions as a declarative statement indicating that a claim or proposition has been successfully demonstrated or verified through evidence or logical reasoning. As Ludwig AI suggests, the truth of something has been confirmed.
Frequent in
Science
85%
News & Media
10%
Formal & Business
5%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "it is proved" is a grammatically correct and commonly used phrase to declare that something has been rigorously demonstrated. Ludwig AI confirms that the phrase indicates the truth of something has been verified. While appropriate for formal and scientific contexts, it's important to avoid overusing passive voice. Alternatives like "it has been demonstrated" or "the evidence shows" can provide stylistic variation. When using the phrase, ensure clarity regarding the subject and supporting evidence. Overall, this construction serves to assert the validity of a statement backed by proof.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
it has been demonstrated
Replaces 'proved' with 'demonstrated', emphasizing the act of showing something to be true through evidence.
it has been verified
Substitutes 'proved' with 'verified', highlighting the confirmation of truth or accuracy.
it is demonstrated
A more direct, less emphatic alternative to the passive construction.
it is established
Uses 'established' instead of 'proved', suggesting that something has been firmly accepted.
the evidence shows
Shifts the focus to the evidence itself, rather than the act of proving.
the data confirm
Highlights that data supports the truth of a particular statement.
it is confirmed
Uses 'confirmed' instead of 'proved', meaning to establish the truth or correctness of.
proof exists that
Highlights the existence of the proof rather than saying something is proved.
the results indicate
Suggests that the results of some work point to certain fact.
it is substantiated
Uses 'substantiated' instead of 'proved', meaning to provide evidence to support or prove the truth of.
FAQs
How can I use "it is proved" in a sentence?
The phrase "it is proved" typically introduces a statement that has been rigorously demonstrated or verified. For example, "It is proved that the Earth revolves around the Sun" or "It is proved that this new drug is effective in treating the disease".
What are some alternatives to saying "it is proved"?
You can use alternatives such as "it has been demonstrated", "it has been verified", or "the evidence shows" depending on the context.
Is "it is proven" grammatically correct, or should I use "it is proved"?
Both "it is proven" and "it is proved" are grammatically correct, but "proved" is generally the preferred past participle of the verb 'to prove'. "Proven" is more commonly used as an adjective, as in "a proven method".
What does "quod erat demonstrandum" mean, and how is it related to "it is proved"?
"Quod erat demonstrandum" is a Latin phrase, often abbreviated as QED, that translates to "what was to be demonstrated" or "that which had to be proved". It is traditionally placed at the end of a mathematical proof or philosophical argument to indicate that the proof or argument has been completed, similarly to how "it is proved" signifies the completion of a demonstration.
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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested