it is unknown how

USAGE SUMMARY

The part of a sentence "it is unknown how" is correct and usable in written English.
It can be used to express that something has not been determined or established, or that something cannot be explained. For example: "It is unknown how the fire started, but a full investigation is underway."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

It is unknown how Prism actually works.

The Guardian

It is unknown how many are fraudulent.

The Washington Post

It is unknown how long the congress will last.

The Guardian

It is unknown how long the recuperation period will last.

The Guardian - Music

It is unknown how long this legal process will take.

The Guardian - Opinion

It is unknown how and when this occurs.

Addictive Behaviors

It is unknown how otolaryngology training programs mentor residents.

Otolaryngology - Head and Neck Surgery

It is unknown how the bill will fair in Senate.

Independent

It is unknown how Duerson voted on Boyd's case.

The New York Times - Sports

It is unknown how many homeowners have encountered such problems.

The New York Times

It is unknown how many were lost at sea.

The Washington Post

Expert writing Tips

Best practice

Use "it is unknown how" to introduce a question or topic that requires further research or investigation.

Common error

Avoid using "it is unknown how" when you can offer a plausible explanation or hypothesis, even if it's not definitive. Instead of simply stating the unknown, try suggesting potential mechanisms or avenues for future research.

Linguistic Context

The phrase "it is unknown how" functions as an introductory clause that sets the stage for expressing uncertainty or a lack of knowledge about a particular process, method, or mechanism. It introduces a point that requires further investigation or research, as seen in Ludwig's examples.

Expression frequency: Very common

Frequent in

Science

60%

News & Media

35%

Formal & Business

5%

Less common in

Wiki

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "it is unknown how" is a grammatically sound and frequently used expression to introduce uncertainty about a process or method. As Ludwig AI confirms, it's suitable for various contexts, especially science and news. While versatile, avoid overuse in speculative writing; instead, offer potential explanations. Alternatives like "the mechanism remains unclear" or "the precise way is still unknown" can provide nuance. Use "it is unknown how" judiciously to highlight gaps in knowledge and invite further inquiry.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

the precise way is still unknown

Highlights the lack of precise knowledge regarding the method or manner.

how it happens is uncertain

Focuses on the uncertainty surrounding the manner in which something takes place.

the mechanism remains unclear

Focuses on the lack of understanding of a process, often in scientific contexts.

it is not clear by which means

Emphasizes that the means or methods by which something occurs are not apparent.

the method is not yet understood

Emphasizes that the process or technique is currently beyond comprehension.

we lack understanding of how

Emphasizes the absence of comprehension regarding a process or method.

the process defies explanation

Highlights the difficulty or impossibility of explaining something.

the underlying mechanism is vague

Highlights the indistinct or poorly defined nature of the fundamental process.

the reasons are still a mystery

Indicates that the causes or motivations behind something are perplexing.

the manner of operation is obscure

Focuses on the ambiguity surrounding the way something functions.

FAQs

How can I rephrase "it is unknown how"?

You can use alternatives like "the method is not yet understood", "the precise way is still unknown", or "how it happens is uncertain" depending on the context.

Is "it is unknown how" formal or informal?

"It is unknown how" is suitable for both formal and neutral contexts, particularly in academic or journalistic writing. Its formality depends on the surrounding text.

What does "it is unknown how" mean?

The phrase "it is unknown how" expresses a lack of understanding or certainty about the method, process, or manner in which something occurs or operates.

When should I use "it is unknown how" in my writing?

Use "it is unknown how" when you want to acknowledge a gap in knowledge or understanding, often to introduce a topic that requires further investigation or research.