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
it remained unknown whether
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "it remained unknown whether" is correct and usable in written English.
You can use it when discussing uncertainty or ambiguity regarding a situation or outcome. Example: "Despite extensive research, it remained unknown whether the treatment would be effective."
✓ Grammatically correct
News & Media
Science
Alternative expressions(19)
it was unclear whether
it was uncertain whether
it remained unclear whether
it was unknown whether
it was uncertain if
it was ambiguous whether
it was unsure whether
it was undetermined if
it remained uncertain if
it was inconclusive to
it remained uncertain
it was questionable whether
it was undetermined whether
the outcome was uncertain
it was unclear if
it was doubted whether
it was questioned whether
it was not clear if
it was not determined whether
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
23 human-written examples
It remained unknown whether any cash or merchandise was stolen.
News & Media
It remained unknown whether such laws would pass constitutional muster in a presidential election.
News & Media
It remained unknown whether the lieutenant had gotten lost or injured, was perhaps captured later by the guerrillas, or was simply waiting for morning to make his way down the volcano, officials said.
News & Media
It remained unknown whether the FBPA metabolites were trapped by tumors and normal tissues.
Science
However, it remained unknown whether SDF1α played such a role in humans.
Science
Differentiation-inducing factor-1 and -2 (DIF-1 and DIF-2) were originally identified as the factors (chlorinated alkylphenones) that induce Dictyostelium stalk cell differentiation, but it remained unknown whether the DIFs had any other physiologic functions.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
37 human-written examples
It remained unknown, however, whether these represented all hemoglobin-like genes within the Atlantic salmon genome.
Science
To date, however, it has remained unknown whether and how MrD participates in pain modulation in the human brain in vivo.
It had remained unknown whether antigen-specific human T cell responses can be elicited in immunodeficient mice transplanted with only human CD34+ HSCs.
Science
However, it has remained unknown whether immature neurons can be recruited into a network before synaptic and functional maturity have been achieved.
Science
The abnormalities of these knockout mice certainly imply a crucial commitment of Akt signals to bone metabolism, yet it has remained unknown whether or not these were due to the cell autonomous effects of the Akt deficiency on bone cells.
Science
Expert writing Tips
Best practice
Use "it remained unknown whether" to introduce a question that persisted without an answer at a certain point in time. It's effective when highlighting a gap in knowledge or understanding.
Common error
Avoid using "it remained unknown whether" in simple sentences where a direct statement of uncertainty would be more effective. For example, instead of "It remained unknown whether he would come", consider "It was uncertain if he would come".
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it remained unknown whether" functions as an introductory clause to a question or statement expressing uncertainty. It sets the stage for a condition or piece of information whose truth or existence was not established at a specific point in time, as exemplified by Ludwig's examples.
Frequent in
Science
54%
News & Media
42%
Formal & Business
4%
Less common in
Encyclopedias
0%
Wiki
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "it remained unknown whether" is a grammatically correct and commonly used expression to introduce a state of uncertainty or a question that lacks a definitive answer. As Ludwig AI confirms, it is prevalent in both scientific and news contexts, indicating its suitability for formal writing. While effective in highlighting gaps in knowledge, overuse in simpler sentences should be avoided in order to achieve effective communication. Several alternatives exist, such as "it was unclear whether" or "it was uncertain whether", offering writers flexibility while maintaining clarity.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
it was not known whether
Replaces "remained unknown" with "was not known", maintaining the core meaning.
it was unclear whether
Substitutes "remained unknown" with "was unclear", emphasizing a lack of clarity.
it was uncertain whether
Replaces "remained unknown" with "was uncertain", highlighting the doubtfulness.
it stayed unknown whether
Replaces "remained" with "stayed", a less formal but similar expression.
it has not been determined whether
Uses a more formal and passive construction to convey the lack of knowledge.
it had not been established whether
Emphasizes the absence of proof or confirmation.
the answer to whether remained elusive
Shifts the focus to the elusiveness of the answer.
the question of whether was still open
Highlights that the question is unresolved.
the truth about whether was yet to be revealed
Focuses on the eventual revealing of the truth, implying current lack of knowledge.
there was no information on whether
Indicates a complete absence of information on the subject.
FAQs
What can I say instead of "it remained unknown whether"?
You can use alternatives like "it was unclear whether", "it was uncertain whether", or "it was not known whether depending on the context.
How do I use "it remained unknown whether" in a sentence?
Use "it remained unknown whether" to introduce a clause expressing uncertainty about a particular situation or outcome. For example: "After the initial investigation, it remained unknown whether the fire was accidental."
Is "it remained unknown whether" formal or informal?
"It remained unknown whether" is generally considered neutral to formal in tone and suitable for academic, news, and professional contexts.
What is the difference between "it remained unknown whether" and "it is unknown whether"?
"It remained unknown whether" refers to a past state of uncertainty, while "it is unknown whether" refers to a present state. The former implies that at some point in the past, the information was not available.
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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested