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
could not say
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "could not say" is correct and usable in written English.
It can be used when expressing uncertainty or inability to provide an answer or opinion on a matter. Example: "When asked about the outcome of the negotiations, she could not say what would happen next."
✓ 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
60 human-written examples
He could not say.
News & Media
She could not say.
News & Media
Garten could not say.
News & Media
I could not say his name aloud.
News & Media
But he could not say when.
News & Media
Mr. Bernanke could not say.
News & Media
HOEPPNER, One could not say that by any means.
Academia
Ohno could not say the same thing.
News & Media
Alli could not say she was surprised.
News & Media
But he could not say more.
News & Media
Exactly which others I could not say.
News & Media
Expert writing Tips
Best practice
Use "could not say" when you want to convey a lack of knowledge, unwillingness, or inability to provide information due to restrictions or uncertainty.
Common error
While grammatically correct, "could not say" might sound overly formal in casual conversations. Consider using simpler alternatives like "didn't know" or "couldn't tell" to maintain a natural tone.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "could not say" functions as a verbal phrase expressing the inability or unwillingness to articulate something. Ludwig AI confirms its proper usage through numerous examples.
Frequent in
News & Media
70%
Academia
15%
Science
5%
Less common in
Formal & Business
3%
Wiki
2%
Reference
1%
Ludwig's WRAP-UP
In summary, "could not say" is a grammatically sound phrase used to express an inability or unwillingness to provide information, whether due to a lack of knowledge, a restriction, or a deliberate choice. Ludwig AI confirms its validity and widespread use, particularly in news and academic contexts. While generally neutral in tone, it's advisable to consider simpler alternatives in informal settings. Understanding its nuances allows for more precise and effective communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
was unable to disclose
Emphasizes a formal constraint or restriction on sharing information.
declined to comment
Highlights a refusal to provide an opinion or information.
could not reveal
Focuses on the inability to make something known, often due to secrecy.
was not at liberty to say
Indicates a lack of permission or authority to share information.
remained silent
Stresses the absence of any statement or response.
couldn't specify
Highlights the lack of detail or precision in what can be said.
was unable to confirm
Emphasizes the inability to verify or validate information.
had no comment
A shorter, more direct way of saying someone declined to provide information.
could not ascertain
Focuses on the inability to find something out for certain.
was unsure
Expresses uncertainty or lack of knowledge.
FAQs
What does "could not say" mean?
The phrase "could not say" means someone was unable to provide information, express an opinion, or answer a question. It can indicate a lack of knowledge, unwillingness, or a prohibition against speaking.
What can I say instead of "could not say"?
You can use alternatives like "was unable to disclose", "declined to comment", or "could not reveal" depending on the context.
Is "could not say" formal or informal?
The phrase "could not say" is generally considered neutral to slightly formal. In very casual settings, simpler phrases like "didn't know" might be more appropriate.
How to use "could not say" in a sentence?
You can use "could not say" to indicate a lack of knowledge or an inability to provide information. For example, "When asked about the details of the agreement, he "could not say" what the specific terms were."
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested