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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
impossible to prove
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "impossible to prove" is correct and usable in written English.
It can be used when discussing a claim, theory, or statement that cannot be substantiated or verified through evidence or reasoning. Example: "The existence of extraterrestrial life remains a topic of debate, with many theories proposed, but ultimately, it is impossible to prove."
✓ Grammatically correct
News & Media
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
58 human-written examples
It is impossible to prove a negative.
News & Media
But it is impossible to prove.
News & Media
Everything else seems impossible to prove.
Academia
Of course, it was impossible to prove.
News & Media
Conceivably, but the case is impossible to prove.
News & Media
But that decision left it virtually impossible to prove bias.
News & Media
But the agency's accounting practices made this impossible to prove.
News & Media
"It's impossible to prove something like that," he said.
News & Media
Another said it was just impossible to prove.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
But even with this, it's impossible to 'prove' Einstein right.
News & Media
Although intuitively insightful, this notion is difficult if not impossible to prove scientifically.
Encyclopedias
Expert writing Tips
Best practice
To enhance clarity, follow "impossible to prove" with an explanation of why evidence is lacking.
Common error
Avoid using "impossible to prove" when evidence is simply hard to obtain but potentially exists. "Difficult to prove" is more appropriate in such cases, as it acknowledges the possibility of future evidence.
Source & Trust
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "impossible to prove" functions as an adjective phrase, typically modifying a noun or pronoun. It indicates that a particular claim, statement, or theory cannot be substantiated with evidence. As Ludwig AI also indicates, the expression is usable in written English.
Frequent in
News & Media
60%
Academia
20%
Wiki
7%
Less common in
Science
7%
Formal & Business
3%
Encyclopedias
3%
Ludwig's WRAP-UP
The phrase "impossible to prove" is a grammatically sound and commonly used expression indicating the absence of verifiable evidence. As Ludwig AI confirms, it is generally deemed correct for use in written English. While versatile, it's important to distinguish it from "difficult to prove", reserving "impossible to prove" for scenarios where evidence is genuinely unattainable. It appears most frequently in News & Media and Academic contexts. Remember to use it accurately to maintain clarity and precision in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
cannot be proven
Replaces "impossible" with "cannot", simplifying the wording while retaining the original meaning.
unprovable
Uses a single adjective to convey the same concept.
lacks substantiating evidence
Focuses on the absence of supporting evidence rather than the impossibility of proof.
cannot be substantiated
Emphasizes the lack of confirmation or validation.
beyond verification
Highlights the inability to verify or confirm the claim.
not demonstrable
Uses a more formal term, "demonstrable", to express the inability to show or prove something.
defies confirmation
Suggests that the claim actively resists attempts to confirm its truth.
remains unconfirmed
Highlights the continuing lack of confirmation.
evidence is elusive
Focuses on the difficulty in finding evidence, suggesting it may exist but is hard to obtain.
incapable of factual validation
Emphasizes the inability to validate the statement with facts.
FAQs
How can I use "impossible to prove" in a sentence?
Use "impossible to prove" when referring to claims or theories for which there is no obtainable evidence. For example, "It is impossible to prove that a specific thought caused a historical event".
What are some alternatives to "impossible to prove"?
You can use alternatives like "cannot be proven", "unprovable", or "lacks substantiating evidence depending on the context.
Is it better to say "impossible to prove" or "difficult to prove"?
The choice depends on the context. Use "impossible to prove" when there's no way to obtain evidence. Use "difficult to prove" when evidence might exist, but is hard to find.
What does it mean when something is described as "impossible to prove"?
It means that, given the current state of knowledge and available methods, there is no way to definitively confirm or deny the claim with evidence. The "evidence is elusive".
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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
86%
Authority and reliability
4.6/5
Expert rating
Real-world application tested