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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
that is impermissible
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is impermissible" is correct and usable in written English.
You can use it to indicate that something is not allowed or is against the rules or regulations. Example: "The use of personal devices during the exam is strictly prohibited, as that is impermissible according to the school's policy."
✓ Grammatically correct
Science
News & Media
Encyclopedias
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
3 human-written examples
Consider a straightforward, observation-based moral judgment: Jane sees two youths hurting a cat and thinks "That is impermissible".
Science
For the microgrids with all inverter-based DGs, the frequency maybe considerably deviated from the nominal value upon disconnection from the utility-grid; that is impermissible for consumers.
The resulting "sukkah" itself, according to the esoteric Talmudic distinction, just came about as an incidental by-product, and that is impermissible.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
That information demonstrated "a bias and a level of advocacy" that was "impermissible," the memo said.
News & Media
Rugby players and boxers are permitted to express their feelings with ostentatious displays that are impermissible for golfers and sumo wrestlers.
Encyclopedias
The combat-arena sequences are bloody and utterly gripping – one of the advantages of returning to a moribund genre 40 years after its heyday is that one can add a level of violence that was impermissible in said heyday – as are the politics and the palace scheming.
News & Media
Furthermore, the permissible propositions are those that are either obligatory or optional, and the omissible propositions are those that are impermissible or optional.
Science
Kant's deontological approach to ethics - the idea that there are some things that are impermissible whatever the consequences - rules out torture.
News & Media
Still, she added, anti-discrimination agencies and companies often issue guidelines about questions that are impermissible in interviews.
News & Media
Under that were several more layers of wallpaper, and beneath that were impermissible newspapers dating back to pre-revolutionary days, apparently pasted to the walls as insulation.
News & Media
Under that were several more layers of wallpaper, and beneath that were impermissible newspapers dating back to pre-revolutionary days, apparently pasted to the walls as insulation..
News & Media
Expert writing Tips
Best practice
Use "that is impermissible" to clearly and formally state that something is not allowed, especially in contexts where rules, regulations, or ethical standards are being discussed. For example, in legal documents or academic papers.
Common error
Avoid using "that is impermissible" in casual conversations or informal writing. Opt for simpler alternatives like "that's not allowed" or "that's not okay" to maintain a natural tone.
Source & Trust
84%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is impermissible" functions as a declarative statement expressing prohibition or inadmissibility. Ludwig confirms its correctness, highlighting its role in conveying that something is not allowed or acceptable according to rules, laws, or moral principles.
Frequent in
Science
34%
News & Media
33%
Encyclopedias
8%
Less common in
Formal & Business
7%
Wiki
6%
Reference
5%
Ludwig's WRAP-UP
In summary, "that is impermissible" is a grammatically sound phrase used to express that something is not allowed or permitted. As Ludwig AI confirms, it is best suited for formal contexts, such as legal, academic, or ethical discussions, where a strong and clear prohibition is required. While not as common in everyday conversation, its use in reputable sources like The New York Times and academic publications underscores its validity. Consider using simpler alternatives like "that is not allowed" in less formal settings. Avoiding overuse in casual speech will help maintain an appropriate and natural tone. It's important to note that this phrase denotes a lack of permission, rather than impossibility.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that is not permissible
A more formal synonym using a different adjective.
that is not allowed
Uses simpler language to convey the same meaning.
that is prohibited
Emphasizes a formal ban or restriction.
that is forbidden
Suggests a stronger, often moral or ethical, prohibition.
that is unacceptable
Focuses on the lack of approval or agreement.
that is out of bounds
Implies exceeding established limits or rules.
that is off-limits
Indicates something is restricted or inaccessible.
that is ruled out
Indicates a decision or condition excludes it.
that is beyond the pale
Conveys extreme unacceptability, often morally.
that is not an option
Presents something as an unviable choice or alternative.
FAQs
What does "that is impermissible" mean?
The phrase "that is impermissible" means that something is not allowed, not permitted, or against the rules.
When should I use "that is impermissible" in writing?
Use "that is impermissible" in formal writing, legal contexts, or when emphasizing a strict prohibition. In less formal contexts, alternatives like "that is not allowed" or "that is forbidden" may be more appropriate.
What are some synonyms for "that is impermissible"?
Synonyms include "that is prohibited", "that is unacceptable", and "that is out of bounds". The best choice depends on the specific context and the level of formality required.
Is "that is impermissible" the same as "that is impossible"?
No, "that is impermissible" means something is not allowed, while "that is impossible" means something cannot be done. They have different meanings. For example: 'Using personal cellphones during the exam is impermissible' versus 'It is impossible to solve this equation without knowing calculus'.
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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
4.1/5
Expert rating
Real-world application tested