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
existing proof
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "existing proof" is correct and usable in written English.
It can be used when referring to evidence or documentation that is already available or established. Example: "The existing proof of the theory supports the claims made by the researchers."
✓ Grammatically correct
Science
News & Media
Alternative expressions(3)
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
4 human-written examples
It is worth mentioning that our proof of the following theorem is very precise and it is interesting to compare it with the existing proof in the literature.
In addition to the results, we follow up a different and novel approach in proving this theorem compared with the existing proof for the rectangular window case where the Stieltjes transform m z) has the explicit inverse [15].
With the necessary proof of concept established in our previous work [ 19], the current work extends our existing proof to a full-fledged implementation of the score dissection idea, herewith, dissectHMMER (available at dissecthmmer.bii.a-star.edu.sg).sg
Science
Although telephone interviews have been noted to be impersonal and not 'the gold standard' for collecting data related to sensitive topics, 59 the method has many advantages, without existing proof of inferiority.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
Existing proofs of this result all rely on uniform ellipticity or hypoellipticity assumptions on the diffusion.
Given this state of affairs, it is not clear what can be concluded from existing proofs of correctness.
Science
Note that all existing proofs of Theorems 1 and 2 involve rather high level geometrical or analytical methods.
Moreover, we develop a proof of Theorem 1.1 which is an alternative proof of (1.1) for all positive real numbers a, b, and r ∈ [ 0, e ], which is distinct from the existing proofs given in [14, 29].
The question is ambiguous because it is not immediately clear whether Wodeham's intention is to show that there is only one God or if he intends to evaluate the relative degrees of evidence of the existing proofs of God's unicity or multiplicity.
Science
Although it has been established with clear assumptions for geometric planners, the panorama of completeness results for kinodynamic planners is still incomplete, as most existing proofs rely on strong assumptions that are difficult, if not impossible, to verify on practical systems.
The rare sightings gave me a strange feeling of both actually existing – look, proof in print!
News & Media
Expert writing Tips
Best practice
When using "existing proof", ensure the context clearly indicates what the proof pertains to and why its existence is relevant to your argument or statement. This adds clarity and strengthens the impact of your message.
Common error
Avoid assuming that "existing proof" is automatically definitive or irrefutable. Always critically evaluate the quality and relevance of the evidence before drawing conclusions, as pre-existing evidence may not always be sufficient or applicable to new situations.
Source & Trust
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "existing proof" functions as a noun phrase where "existing" modifies the noun "proof". It is typically used to refer to evidence or validation that already exists or is readily available, as demonstrated by Ludwig.
Frequent in
Science
50%
News & Media
33%
Formal & Business
17%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "existing proof" is a grammatically correct and usable term that refers to evidence or validation that is already available. As Ludwig AI states, it is typically used in neutral to formal contexts, spanning across science, news, and formal writing. While not overly frequent, its use is clear and consistent. Alternative phrases such as "available evidence" or ""current evidence"" can be used for variety. When employing "existing proof", ensure its relevance and strength are carefully considered. It's important to avoid overstating its definitiveness without proper evaluation.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
available evidence
Emphasizes the accessibility and readiness of the evidence.
current evidence
Highlights the evidence that is presently valid or known.
established evidence
Focuses on the evidence that has been confirmed or proven.
present evidence
Highlights the evidence that is currently being considered.
on hand evidence
Indicates that evidence is readily accessible and prepared for use.
prior evidence
Refers to the evidence that existed before the current situation.
previous evidence
Similar to prior evidence, but with a slightly broader scope.
documented evidence
Focuses on the evidence that has been formally recorded.
pre-existing evidence
Highlights evidence that was in place or known before a specific event or time.
already available evidence
Emphasizes the availability of evidence, using a more descriptive wording.
FAQs
How can I use "existing proof" in a sentence?
You can use "existing proof" to refer to evidence or documentation that is already available. For example: "The "current evidence" suggests a need for further investigation."
What's a simple way to describe "existing proof"?
A straightforward way to describe "existing proof" is by using phrases like "available evidence", "current evidence", or "established evidence". These highlight the presence of evidence that is already present and accessible.
How does "existing proof" differ from "new evidence"?
"Existing proof" refers to evidence that has already been established or documented, while "new evidence" points to information that has recently come to light. The key difference lies in the timing and prior availability of the evidence.
In what situations is it appropriate to use "existing proof"?
Use "existing proof" when you want to emphasize that there's a basis for an argument or claim that is already documented or known. For instance, you might say, "Documented evidence supports the need for updated safety protocols."
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
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested