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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
namely which
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "namely which" is not correct and is not typically used in written English.
It is generally used to introduce a specific example or clarification, but the combination is awkward and redundant. Example: "There are several factors to consider, namely which ones will have the most impact on our decision."
⚠ May contain grammatical issues
Science
News & Media
Academia
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
37 human-written examples
This theorem concerns a question that goes back to the time of Pierre de Fermat (1601-1665), namely, which quadratic forms represent all integers?
News & Media
This prompts a question so fundamental that it keeps recurring all the way through Walking in My Mind: namely, which art form best conveys the mind's mysterious workings?
News & Media
Namely, which bounded linear operators on the Hardy space preserve the set of all shifted outer functions?
Ladies and gentlemen, surely one of the most vexed questions of this or any other age – namely which book should be crowned, in this, the 70th anniversary year of the publishing list's birth, the Puffin of Puffins?
News & Media
We read what publishers submit to us; we're permitted to call in a maximum of 12 additional titles, a process that presumes we already know what we can't know, namely which books we will like that we haven't heard of.
News & Media
Again, as signs of the recovery emerge, the horrendous post-crisis spending black hole is being bickered round in the political debate in the narrowest terms, namely which party will cut public services most.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
23 human-written examples
There was a 9-bp deletion in exon 19, namely, c.2239_2247del9, which resulted in a deletion of three amino acids, namely p.L747_E749del.
Science
We examined one such method, namely PRVCS52, which unfortunately had poor performance (Supplementary Figure 11).
Science & Research
The probability of correctly receiving either character is the same, namely, p, which accounts for the designation symmetric.
Encyclopedias
In this paper "meaningfulness" has a particular meaning, namely accuracy, which is closeness to truth.
Capability evaluation was performed using statistical methods, namely indices which define the measuring device capability.
Science
Expert writing Tips
Best practice
Avoid using the phrase "namely which" in formal writing. Opt for alternatives like "specifically which" or "that is which" to ensure grammatical correctness and clarity.
Common error
The phrase "namely which" is often redundant. "Namely" already introduces a specific item or clarification, so adding "which" can make the sentence sound awkward and repetitive. Reword to use either "namely" or "which" for better clarity.
Source & Trust
84%
Authority and reliability
2.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "namely which" functions as an introduction to a specific element or clarification. However, it's considered grammatically incorrect and redundant, as "namely" already serves this purpose. Ludwig AI highlights this issue.
Frequent in
Science
37%
News & Media
37%
Academia
26%
Less common in
Encyclopedias
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "namely which" is generally considered grammatically incorrect due to its redundancy. "Namely" already serves to introduce a specific item, making the addition of "which" unnecessary and awkward. As Ludwig AI points out, better alternatives include "specifically which" or "that is which", which offer greater clarity and grammatical correctness. Although the phrase appears across various sources, including science, news, and academia, it's best avoided in formal writing. Opting for clearer alternatives ensures effective communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
specifically which
Replaces "namely" with "specifically" to directly emphasize the precise item or aspect being referred to. It enhances clarity and precision.
that is which
Uses "that is" to clarify and then specifies "which", making the sentence more grammatically sound.
in particular which
Emphasizes a specific item among others, similar to "namely", but uses "in particular" for clearer emphasis.
precisely which
Highlights the exact item or aspect, focusing on accuracy and detail.
that is to say which
Provides a more explanatory clarification before specifying "which", enhancing understanding.
to be specific which
Introduces a specific detail or item, similar to "namely", but uses a more formal tone.
more precisely which
Refines a previous statement to be more accurate and specific, clarifying "which" aspect is being referred to.
for example which
Introduces an example to illustrate which particular case or item is meant.
by way of example which
Provides an illustrative instance, similar to "for example", but with a more formal tone.
as an illustration which
Clarifies by giving an example, emphasizing understanding through illustration.
FAQs
How can I rephrase a sentence that uses "namely which"?
Replace "namely which" with phrases like "specifically which" or "that is which" for improved clarity and grammatical correctness. For example, instead of "The problem, namely which solution to implement, was debated", try "The problem, specifically which solution to implement, was debated."
What does "namely" mean, and how does it differ from "which"?
"Namely" introduces a specific example or clarification. "Which" is used to ask a question or to specify one or more things from a set. Using them together, as in "namely which", is often redundant. Refer to examples using "specifically which".
Is "namely which" grammatically correct in English?
No, "namely which" is generally considered grammatically incorrect. It's better to use either "namely" followed by a clear explanation or to rephrase the sentence using alternatives like "that is which".
When is it appropriate to use "namely" in a sentence?
"Namely" is appropriate when you want to introduce a specific example or clarification. For instance, "There are several factors to consider, namely cost, time, and resources." Using alternatives like "specifically which" could make your point more effective.
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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
2.1/5
Expert rating
Real-world application tested