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
before knowing whether
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "before knowing whether" is correct and usable in written English.
You can use it when discussing a situation or decision that requires information or confirmation before proceeding. Example: "I need to gather more information before knowing whether I should accept the job offer."
✓ Grammatically correct
News & Media
Science
Alternative expressions(1)
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
13 human-written examples
Patients and parents will receive the questionnaires and a return envelope about two weeks before every other visit to the orthopedic surgeon; thus they can fill out the questionnaires before they know the results of the X-ray (i.e., before knowing whether or not the curvature has progressed).
Some women have sought illegal abortions before knowing whether their babies had microcephaly.
News & Media
Investors have been refusing to commit themselves to stocks before knowing whether there will be war with Iraq.
News & Media
They have to wait to see how the rest of the field fares Friday before knowing whether they will advance to the Grand Prix Special on Tuesday.
News & Media
But preservationists said Mayor Richard M. Daley should not have bought the campus before knowing whether it would win the Olympics bid.
News & Media
City defender Richard Dunne was sent off in the final game of the season at Middlesbrough, meaning an anxious wait for the club before knowing whether they were in the UEFA Cup.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
47 human-written examples
As it was not known in advance whether vacuum extraction would be needed consent forms were signed and collected before knowing if an indication for vacuum extraction would in the end be decided.
Science
Petrovic had left the United States weeks before, not knowing whether he would return or stay in Europe and play for a club team.
News & Media
It's not uncommon for young researchers in Spain to start a Ph.D. before knowing for sure whether they've secured funding.
Science & Research
We therefore need to know which covariates predict health utility after emergency medical care, as well as knowing whether measurement is feasible, before health utility can become a widely-used outcome measure for emergency care.
They'd left the night before and had no way of knowing whether their homes survived.
News & Media
Expert writing Tips
Best practice
When using "before knowing whether", ensure that the sentence clearly indicates the consequence or action taken in the absence of that knowledge. This adds clarity and impact to your writing.
Common error
A common mistake is to use "before knowing" without a clear "whether" clause, leading to ambiguity. Always specify what information is unknown. For example, instead of "They left before knowing", write "They left before knowing whether they would return."
Source & Trust
84%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "before knowing whether" functions as a conjunction phrase, connecting a clause that describes an action or state to a clause that expresses uncertainty or lack of knowledge. As shown by Ludwig, it introduces a condition of lacking information at a specific point in time.
Frequent in
News & Media
50%
Science
50%
Formal & Business
0%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "before knowing whether" is a grammatically correct and usable conjunction phrase that connects actions to a state of uncertainty. According to Ludwig, its primary function is to emphasize timing relative to gaining information. The phrase appears most frequently in news and scientific contexts and is considered to have a neutral register. When using this phrase, ensure you clearly indicate what information is unknown to avoid ambiguity. For alternative phrasing, consider "prior to ascertaining if" or "without confirmation of". This analysis provides a comprehensive understanding of how to effectively incorporate "before knowing whether" into your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
prior to ascertaining if
Uses a more formal vocabulary and structure.
without confirmation of
Focuses on the lack of confirmation as the key element.
ahead of determining whether
Emphasizes the temporal aspect of acting before a determination.
until it is known if
Shifts the focus to the point in time when the knowledge is acquired.
before being informed if
Highlights the state of being informed as the critical condition.
lacking the knowledge of if
Emphasizes the absence of information.
proceeding without knowing if
Highlights the action of proceeding despite the lack of knowledge.
prior to finding out whether
Uses a more informal vocabulary, focusing on the act of finding out.
without the certainty of if
Emphasizes the absence of sureness or confidence.
before understanding whether
Highlights the lack of comprehension or understanding.
FAQs
How can I rephrase "before knowing whether" in formal writing?
In formal contexts, you can use alternatives such as "prior to ascertaining if", "prior to determining whether", or "ahead of determining whether" for a more sophisticated tone.
Is it always necessary to include "whether" after "before knowing"?
While not always grammatically mandatory, including "whether" generally improves clarity by explicitly indicating that there's a choice or uncertainty involved. Omitting it can sometimes make the sentence sound incomplete or awkward.
Which is more appropriate: "before knowing whether" or "without knowing whether"?
"Before knowing whether" emphasizes the timing of an action relative to gaining knowledge, while "without knowing whether" focuses on the state of lacking knowledge during the action. The choice depends on the specific nuance you want to convey. For instance, "He acted "without knowing whether" it was safe" highlights the lack of knowledge at the moment of action.
What's the difference between "before knowing whether" and "after knowing whether"?
"Before knowing whether" implies a decision or action is taken in the absence of certain knowledge, while "after knowing whether" implies the decision or action is informed by that knowledge. These phrases are opposites in meaning and context.
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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