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
cannot be identified
Grammar usage guide and real-world examplesUSAGE SUMMARY
"cannot be identified" is correct and usable in written English.
You can use it when something can't be identified definitively or confidently. For example: "The cause of the crash cannot be identified."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
has not obtained yet
cannot be detained
is unavailable
is not assembled
has no future
cannot be maintained
cannot be build
cannot be consolidated
is devoid of
is not available yet
has yet to be updated
is without
remains unupdated
remains uncertain
cannot be found
is not maintainable
cannot be retained
cannot be initiated
has not yet resigned
is unrecoverable
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
An attacker who cannot be identified cannot be threatened.
News & Media
For one thing, it cannot be identified as national literature.
News & Media
Under the ground rules for the briefing, the official cannot be identified.
News & Media
"But it's frustrating that the rest of the problems cannot be identified".
News & Media
The man, referred to in court only as P, cannot be identified.
News & Media
Modernity cannot be identified with any particular technological or social breakthrough.
News & Media
The contours of a new system cannot be identified overnight or imposed on anyone.
News & Media
Under Spanish custom, the spokesmen, who spoke by telephone, cannot be identified.
News & Media
What use is a fit-and-proper-person test for incoming owners who cannot be identified?
News & Media
The apostles cannot be identified because they are not portrayed with their symbols.
News & Media
Obviously, those inside the country cannot be identified for fear of retribution.
News & Media
Expert writing Tips
Best practice
Use "cannot be identified" when the subject's identity or nature is genuinely impossible to ascertain with the available information or methods.
Common error
While "cannot be identified" is grammatically correct, avoid overuse of passive voice. In some cases, consider restructuring the sentence to use an active voice if the actor is known or implied for more direct and engaging writing.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "cannot be identified" primarily functions as a passive construction, indicating that the subject is unable to be recognized or determined. As confirmed by Ludwig, it's a grammatically sound and usable expression.
Frequent in
Science
48%
News & Media
40%
Formal & Business
12%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "cannot be identified" is a common and grammatically correct expression used to indicate the impossibility of determining something's identity or origin. As Ludwig AI confirms, it's suitable for written English. Predominantly found in scientific and news contexts, as well as business communication, this passive construction serves to convey uncertainty or a lack of conclusive information. Alternatives include "is unidentifiable" and "cannot be determined". While widely accepted, writers should be mindful of passive voice overuse, opting for more direct constructions when appropriate.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is unidentifiable
Replaces the passive voice with a direct adjective, focusing on the state of being impossible to identify.
cannot be determined
Shifts focus to the process of determination rather than identification, emphasizing the inability to ascertain something.
is impossible to ascertain
Emphasizes the impossibility of confirming or establishing something with certainty.
remains unknown
Highlights the lack of knowledge about something, focusing on the state of being unknown.
cannot be recognized
Focuses on the inability to recognize something, whether visually or conceptually.
defies recognition
More emphatic, suggesting something actively resists being recognized or understood.
is not discernible
Focuses on the lack of clarity or distinctness, making it impossible to perceive or distinguish something.
escapes detection
Highlights the fact that something avoids being found or noticed, often implying a deliberate effort to remain hidden.
eludes classification
Indicates something cannot be neatly categorized or assigned to a specific group.
is beyond comprehension
Indicates that something is impossible to understand.
FAQs
How can I use "cannot be identified" in a sentence?
Use "cannot be identified" when you want to express that something or someone's identity or characteristics are impossible to determine. For example, "The source of the leak "cannot be identified" without further investigation."
What are some alternatives to "cannot be identified"?
You can use alternatives like "is unidentifiable", "cannot be determined", or "remains unknown" depending on the specific context and nuance you wish to convey.
Is it better to say "cannot be identified" or "is not identified"?
"Cannot be identified" implies an impossibility to identify, while "is not identified" simply states that something has not been identified, without necessarily implying it's impossible. The best choice depends on whether you want to emphasize the impossibility or simply the lack of identification.
What is the difference between "cannot be identified" and "cannot be recognized"?
"Cannot be identified" suggests an inability to determine the specific identity or nature of something. "Cannot be recognized" suggests an inability to recall or acknowledge something known previously. For example, a person's face "cannot be recognized" after plastic surgery, but the source of a mysterious sound "cannot be identified".
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested