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
clarification needed
Grammar usage guide and real-world examplesUSAGE SUMMARY
"clarification needed" is a perfectly acceptable and frequently used phrase in written English.
It is typically used with the intent of requesting additional information in order to gain a better understanding of the context. For example, if someone wrote "John's fascination with mechanics began when he was 5 years old", one might respond with "Clarification needed: is John a mechanic by trade, or does he simply enjoy it as a hobby?".
✓ Grammatically correct
Science
News & Media
Wiki
Alternative expressions(20)
clarification is needed
clarification required
explanation is necessary
further details required
further details needed
explanation needed
additional information requested
information needed
more details needed
justification needed
further details
elaborate on
clarifications
further explanation needed
more information is needed
clarification requested
clarification sought
further information requested
additional information needed
wtf meaning
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
2 human-written examples
Howard Collins, LU's chief operating officer, said: "Over the past days we have held in-depth talks with all four Tube unions at Acas, seeking to give any clarification needed concerning our fair Olympic pay and recognition offer.
News & Media
A reservoir, a pump, or combined unit like the XSPC, a CPU waterblock, tubing, fixings (clarification needed) and a radiator (these can be active with a fan or passive without a fan).. Moving up a stage you can then buy a waterblock for your GPU (graphics card).
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
A further clarification needs to be made about how much work is involved in bringing a book to the market.
News & Media
The molecular mechanism that is the basis of NF- κB induction by GEM is still unknown and its clarification needs additional investigations.
Science
As no-disclaimer-no-clarification needed people.
News & Media
Gaps identified or clarifications needed were discussed and corrections made accordingly.
Science
A few clarifications need to be made.
News & Media
This clarification need typically arises when it comes to representing temporal aspects or diagnoses stated in abstract terms that are usually only clear to clinicians.
— NAILA-JEAN MEYERS Clarification was needed when Oprah asked him the financial toll of his demise.
News & Media
We are still being told more clarification is needed about the warranty.
News & Media
Hence, clarification is needed.
Expert writing Tips
Best practice
In formal emails, integrate the phrase into a complete sentence like 'There is some clarification needed regarding...' to maintain a professional flow.
Common error
Using "clarification needed" as a standalone sentence in a client email can come across as overly blunt or demanding. It is better to soften the request by saying 'I believe some "clarification is needed"' to maintain a polite tone.
Source & Trust
84%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
In the data from Ludwig AI, "clarification needed" functions as a reduced relative clause (short for 'clarification that is needed') or a noun-adjective pairing. It often acts as a predicate or a shorthand label to identify a state of ambiguity.
Frequent in
Science
55%
News & Media
25%
Wiki
10%
Less common in
Encyclopedias
5%
Formal & Business
3%
Social Media
2%
Ludwig's WRAP-UP
In conclusion, "clarification needed" is a highly efficient and widely accepted phrase in professional writing. According to Ludwig AI, it is particularly prevalent in scientific and academic discourse where identifying ambiguity is crucial for accuracy. While it is perfectly correct to use as a shorthand in technical documents or peer reviews, writers should be mindful of its brevity in direct correspondence. In formal letters or emails, expanding the phrase to ""clarification is needed"" or using a more descriptive alternative like "further details required" can help maintain a more conversational and polite tone. Overall, it remains a staple for anyone involved in collaborative editing, scientific research or investigative journalism.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
clarification required
Shifts to a more authoritative tone using 'required' to indicate a mandatory need.
further details needed
Specifies that the 'clarification' specifically refers to more in-depth information or data.
elaboration needed
Implies that the existing point is too brief and needs expanding.
more information required
A broader alternative that focuses on the general lack of data.
clarity needed
Focuses on the quality of understanding rather than the act of explaining.
specification required
Used when the ambiguity stems from a lack of precise parameters.
explanation needed
More direct and slightly less formal than 'clarification'.
additional information requested
Changes the passive 'needed' to a more proactive 'requested' action.
precision required
Focuses on the exactness of the information provided.
context needed
Specifically requests the surrounding information necessary to understand a point.
FAQs
How do I use "clarification needed" in a sentence?
You can use it as a passive description, such as 'There was some "clarification needed" regarding the new policy', or as a parenthetical note in technical writing.
What can I say instead of "clarification needed"?
Depending on the level of formality, you can use phrases like "clarification required", "details needed", or "explanation is necessary".
Is "clarification needed" or "clarification is needed" more correct?
Both are grammatically sound. "clarification needed" is a reduced relative clause often used in headers or short notes, while ""clarification is needed"" is a full sentence more appropriate for formal prose.
When should I use "clarity needed" instead of "clarification needed"?
Use "clarity needed" when the message is confusing, whereas "clarification needed" is better when specific details are missing.
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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
84%
Authority and reliability
4.8/5
Expert rating
Real-world application tested