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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
is either under
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is either under" is correct and usable in written English.
It can be used when discussing options or conditions that involve being beneath or below something, often in a comparative context. Example: "The project is either under budget or ahead of schedule, which is a positive outcome."
✓ Grammatically correct
News & Media
Science
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
14 human-written examples
"But work is either under way or complete at all such facilities that we've been allowed access to in Russia.
News & Media
Nonetheless, their gratuitous display by some of the largest and most respected news broadcasters has left the impression that Iran is either under nationwide martial law or experiencing a bloodbath under complete darkness.
News & Media
At least 40% of the $11bn World Cup construction programme – including stadiums, training facilities, transport infrastructure and hotels – is either under way or has been completed, the Russian organising committee told the Guardian this week.
News & Media
Already Sandtorkai, one of the 10 neighborhoods that will make up HafenCity, is complete; 50 percent of the area is either under construction or ready for it to start.
News & Media
Some 60% of the country is either under sea level or at risk of regular flooding from the North Sea or the Rhine, Meuse and Schelt rivers and their tributaries.
News & Media
"He should not feel that he is either under any pressure or any threat for having done what he was morally required to do as a member of the department," Mr. Powell said of Mr. Westermann's decision to express his concern to members of the House and Senate Intelligence Committees.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
44 human-written examples
A misspecification of this parameter might lead to a study that is either under- or overpowered.
So it's possible your own canine companion is either under- or over-hydrated.
News & Media
4. Strength is compromised if bone is either under- or over-mineralized.
Science
We believe that the true incidence of -thromboembolism after hip arthroscopy is either under-reported or unrecognised, with no formal guidelines on the need, type or duration of thromboprophylaxis.
Science
This lack of a Von Baerian trajectory in expression level is also apparent among misexpressed genes in the hybrids, where the larval stage shows the highest proportion of misexpressed genes and the two sampled pupal time points the least (note that a gene is only considered 'misexpressed' if it is either under- or over-expressed in the male hybrids relative to both male parents).
Science
Expert writing Tips
Best practice
When using "is either under", ensure that the two conditions or states being compared are mutually exclusive and clearly defined to avoid ambiguity.
Common error
Avoid using "is either under" when the two conditions are not mutually exclusive. This can lead to confusion. For example, don't say "The project is either under budget or experiencing delays" if delays could be caused by budget issues. Instead, clarify the relationship or use different phrasing.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is either under" functions as a connector that introduces alternative conditions or states. It sets up two possibilities, suggesting that one or the other is true. This is supported by the examples provided by Ludwig, which showcase its use in various contexts.
Frequent in
News & Media
40%
Science
30%
Formal & Business
10%
Less common in
Wiki
10%
Academia
5%
Reference
5%
Ludwig's WRAP-UP
In summary, the phrase "is either under" serves to introduce alternative states or conditions, providing a framework for discussing possibilities or uncertainties. Ludwig AI confirms that the phrase is grammatically correct and common in contexts ranging from news media and science to business communications. When using this phrase, clarity is key; ensure the alternatives are mutually exclusive to avoid confusing your reader. While "is either under" enjoys broad applicability, choosing semantically aligned alternatives such as "is alternatively subject to" or "is conditionally beneath" can sometimes sharpen the focus depending on the context.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is alternatively subject to
Replaces "either under" with "alternatively subject to", emphasizing the alternative condition or state.
is alternatively controlled by
Changes "either under" to "alternatively controlled by", focusing on different controlling factors.
is alternatively affected by
Replaces "either under" with "alternatively affected by", emphasizing the influence or impact.
is conditionally beneath
Substitutes "either under" with "conditionally beneath", indicating a dependent or situational condition.
is potentially influenced by
Changes "either under" to "potentially influenced by", focusing on possible effects.
is perhaps subjected to
Replaces "either under" with "perhaps subjected to", suggesting a tentative or uncertain condition.
is possibly governed by
Replaces "either under" with "possibly governed by", highlighting the potential influence or control.
is conditionally within the scope of
Substitutes "either under" with "conditionally within the scope of", indicating that something is restricted or limited.
is subject to alternative
Replaces "either under" with "subject to alternative", indicating an alternative option is available.
is possibly within
Changes "either under" to "possibly within", indicating a range or limit.
FAQs
How can I use "is either under" in a sentence?
Use "is either under" to present two alternative states or conditions, such as, "The construction project "is either under" budget or on schedule".
What phrases are similar to "is either under"?
Similar phrases include "is alternatively subject to", "is conditionally beneath", or "is possibly governed by", each adding nuances of conditionality or subjection.
What's the difference between "is either under" and "is both under"?
"Is either under" presents two mutually exclusive possibilities, whereas "is both under" implies that both conditions are simultaneously true. For example, "The company "is either under" new management or going bankrupt" suggests two separate paths, while "The company is both under investigation and restructuring" suggests two simultaneous actions.
When is it appropriate to use "is either under" in formal writing?
It is appropriate in formal writing when presenting clear, mutually exclusive alternatives, such as in reports or analyses where different scenarios are being considered. For instance, "The hypothesis "is either under" review or has been rejected".
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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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested