none known

USAGE SUMMARY

"none known" is a correct and commonly used phrase in written English.
It is used to indicate that no information is available about something. For example, "The origin of this species is none known."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

15 human-written examples

The dissemination of individual concentrations of select persistent environmental chemicals to women participating in a prospective pregnancy study did not introduce any known harm, at least none known to the research team.

Environmental Health: A Global Access Science Source

"For example, there are only three or four rhinoceros from Borneo left in captivity and none known in the wild," said Hildebrandt.

The Guardian

These techniques were authorized by a set of secret rules for the interrogation of high-level Qaeda prisoners, none known to be housed in Iraq, that were endorsed by the Justice Department and the C.I.A.

The New York Times

Mr. Somary, the artistic director of the Mendelssohn Project, has tracked down and edited those scores, and he unveiled 13 of them — none known to have been performed before, even in Mendelssohn's lifetime — on Wednesday evening at the Museum of Jewish Heritage.

The New York Times - Arts

In 2012, there were still none known of in Lincoln, Daventry or Wellingborough, while one was known of in Northampton.

BBC

None known.

Cochrane Database of Systematic Reviews

Human-verified similar examples from authoritative sources

Similar Expressions

41 human-written examples

None knew the answer.

Independent

None knew which was which.

The New York Times - Health

@WashingtonPoint none knew the others had been interviewed.

The New York Times

This evening none knew what the maneuvering would produce.

The New York Times

Astonishingly, none knew about the mission's hotline to report such abuse.

Independent

Expert writing Tips

Best practice

Use "none known" to clearly and concisely indicate the absence of specific information, especially in formal reports or scientific documentation. For instance, in a medical study, you might state "Side effects: none known".

Common error

Avoid using "unknown" as a direct replacement for "none known" if you need to emphasize that active efforts have been made to find information and have been unsuccessful. "Unknown" simply implies a lack of knowledge, whereas "none known" implies a lack of discovered or reported information despite potential investigation.

Linguistic Context

The primary grammatical function of "none known" is to serve as a predicate adjective, indicating a state of lacking information or knowledge. As Ludwig AI confirms, it is a valid phrase. It's often used after a noun to specify that information about that noun is absent, as seen in the examples.

Expression frequency: Uncommon

Frequent in

Science

60%

News & Media

30%

Formal & Business

10%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "none known" is a grammatically correct and commonly used phrase to indicate the absence of information. As confirmed by Ludwig AI, its primary function is to state that nothing is known about a particular subject, especially in formal or scientific contexts. It is a concise way to express that, despite potential investigations, no information has been discovered or reported. While phrases like "unknown" exist, "none known" distinctly implies an active effort to find information. This phrase is more frequently used in scientific and news media sources, reflecting its suitability for conveying factual information regarding the absence of specific details.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

not known

Simple substitution of "none" with "not".

unknown

A more concise, single-word alternative.

not identified

Emphasizes the lack of identification, suitable when referring to specific items or entities.

not ascertained

A more formal way of saying something has not been found out for certain.

unidentified

Similar to "unknown" but often used when something exists but its identity is missing.

not established

Indicates that something hasn't been proven or confirmed.

undetected

Highlights the absence of detection.

not recognized

Suggests something isn't formally acknowledged or understood.

information unavailable

Directly states the lack of accessible information.

no data available

Specifically indicates an absence of data on a subject.

FAQs

How can I use "none known" in a sentence?

You can use "none known" to indicate that there is no information available about something. For example, "The long-term effects of this medication are "none known"".

What's a formal alternative to "none known"?

A more formal alternative to "none known" is "information unavailable". This is suitable for official reports or academic papers.

When is it appropriate to use "none known" over "unknown"?

"None known" is appropriate when you specifically want to emphasize that, despite attempts to find information, nothing has been discovered or reported. "Unknown" is more general and simply indicates a lack of knowledge.

Can "none known" be used in informal writing?

While "none known" is generally suitable for formal or technical contexts, it can also be used in informal writing when a concise and clear statement about the absence of information is needed. However, less formal phrases like "not known" may be preferred in casual conversation or writing.