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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
at either one
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "at either one" is correct and usable in written English.
It can be used when referring to two options or choices, indicating that something applies to either of them. Example: "You can choose to meet at either one of the two locations we discussed."
✓ Grammatically correct
Science
News & Media
Academia
Alternative expressions(20)
at either location
in either place
at either spot
at either end
at both sites
in either spot
at either site
in either venue
in both places
in either situation
in both locations
in either scenario
in both instances
in either event
in both areas
in both positions
in either location
in either growth
in either business
in either study
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
47 human-written examples
A screen of 170 cultivated and 102 wild accessions based on sequence variation within the testa color-associated genes encoding flavonoid 3′-hydroxylase (F3′H) and flavonoid 3′,5′-hydroxylas e (F3′5′H) has shown that the joint allele constitution was more predictive of testa color than was the allelic state at either one of the two genes on its own [ 66].
Science
"And we always spend our summers out on the island at either one of our family's homes". But they failed to integrate into the community -- in large part because they couldn't find it.
News & Media
Model solutions ultimately stabilize at either one real equilibrium or the pseudo-equilibrium on the switching surface of the present model, depending on the threshold value determined by some related parameters.
Science
In this second model, low risk of disease is dependent on inheriting two low-risk alleles at either one or both loci (AA and/or BB).
Science
Therefore, we focused on metabolites that were significantly different from the baseline at either one of the two clinical time points as well as in endotoxemia.
Science
Researchers took blood samples from babies in a health centre in the Gambia, at birth and then again at either one, three or seven days old.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
13 human-written examples
Summing up, each acholeplasma species possesses at least one full operon which encodes at least either one H+ or one Na+ ATPase system.
Science
But I'm not into joining the two cultures at the expense of either one".
News & Media
And if defenses didn't have enough to worry about, Piedmont likes to play two quarterbacks at once, either one of whom can receive the snap.
News & Media
They consumed at least either one of cocaine, marihuana, morphine, heroin, LSD, alcohol or paint thinner in addition to METH.
"Some people can even move their ears, either one at a time or both together".
News & Media
Expert writing Tips
Best practice
When using "at either one", ensure that there are only two clear options or locations being referenced to avoid ambiguity. Be clear about what the "one" refers to.
Common error
Avoid using "at either one" when there are more than two options; instead, use "at any one" or "at any of them" to maintain grammatical accuracy and clarity.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "at either one" functions as a prepositional phrase, often used to specify a location, choice, or condition that applies to one of two possibilities. Ludwig shows the phrase is commonly used across diverse contexts.
Frequent in
Science
44%
News & Media
38%
Academia
6%
Less common in
Formal & Business
2%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "at either one" is a grammatically correct and frequently used prepositional phrase, as affirmed by Ludwig. It serves to indicate a choice between two options, commonly appearing in science, news media, and academic writing. While versatile, it is crucial to ensure only two options are present to maintain clarity. Alternatives like "at either of the two", "at either location", and "at either option" can be used depending on the specific context. Using "at either one" in various sentences is correct as long as the sentence only offers two options.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
at either of the two
Emphasizes that there are specifically two options being considered.
at either location
Substitutes "one" with "location" to specify a place.
at either option
Replaces "one" with "option" to emphasize choice.
in either place
Uses "in" instead of "at" to denote position or location.
at one or the other
Rephrases the expression to emphasize choosing one from the pair.
at either spot
Replaces "one" with "spot", referring to a specific location.
at either point
Replaces "one" with "point", which could refer to a location or a stage in time.
at either end
Specifies "end" instead of "one", often used in spatial contexts.
at either extreme
Replaces "one" with "extreme", suggesting a choice between two extremes.
at either side
Replaces "one" with "side", used to indicate a choice between two sides.
FAQs
How can I use "at either one" in a sentence?
Use "at either one" to indicate a choice between two options. For example, "You can pick up the package "at either one" of the two branches".
What is a synonym for "at either one"?
Alternatives include "at either of the two", "at either location", or "at either option" depending on the context.
Is it correct to use "at either one" when referring to more than two options?
No, "at either one" is specifically for two options. For more than two, use phrases like "at any one" or "at any of them".
What's the difference between "at either one" and "at both"?
"At either one" indicates a choice between two, while "at both" implies that something occurs at two locations or options simultaneously.
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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
4.5/5
Expert rating
Real-world application tested