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
some certain
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "some certain" is not correct and is not used in written English.
Rather, you may use "some" or "certain" depending on the context. For example, "I'm not sure what he's doing, but I'm certain it's something important."
⚠ May contain grammatical issues
Science
News & Media
Academia
Alternative expressions(8)
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
60 human-written examples
On some certain issues they certainly knew".
News & Media
Healthy foods can be culprit in some certain diseases.
Academia
However, for self-compactability, the paste phase must meet some certain criteria at fresh state.
Science
There are some certain side effects for shift work documented in occupational references.
Science
Interestingly, for some certain states the Hopf bifurcations are both subcritical and supercritical.
Note: there may be some certain background file types that this script cannot locate.
Academia
For some, certain issues have become even more acute under the current leadership.
News & Media
Rationing of some certain commodities has already begun as supermarkets run out of provisions.
News & Media
For some certain spin rates, the passive stability criterion obtained from the rigid model may become invalid.
Those missing capabilities can greatly help for some certain nuclear tools designs, such as a nuclear lithology/mineralogy spectroscopy tool.
If the similarity score reaches some certain value, then the system will automatically recognize the new face.
Academia
Expert writing Tips
Best practice
Avoid using "some certain" in formal writing. Opt for either "certain" or "some", depending on whether you want to emphasize the definiteness or the quantity. For example, instead of "some certain problems", consider "certain problems" or "some problems".
Common error
The phrase "some certain" includes two limiting adjectives where one is sufficient. Using both weakens the writing and can confuse the reader. Prefer stronger, more concise word choices to enhance clarity.
Source & Trust
86%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "some certain" functions as a determiner modifying a noun. While intending to specify or limit the noun, Ludwig AI confirms this phrase is grammatically incorrect because it uses two determiners with similar meanings redundantly.
Frequent in
Science
39%
News & Media
20%
Academia
15%
Less common in
Formal & Business
1%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, while the phrase "some certain" is frequently encountered, Ludwig AI identifies it as grammatically incorrect due to the redundant use of two determiners. It appears across various contexts, including science, news, and academia but is best avoided in formal writing. Opt for alternatives like "certain", ""specific"", or "some" to enhance clarity and precision. Avoiding "some certain" will improve the quality and impact of your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
certain
Removes the redundant "some", focusing directly on the quality of being definite or sure.
some specific
Replaces "certain" with "specific" to emphasize particularity, retaining "some" to indicate a limited quantity.
certain specific
It corrects the grammatical error but maintains emphasis on both certainty and specificity.
particular
Uses "particular" to denote a specific or distinct item or aspect, avoiding the redundancy.
specific
Focuses on the detailed and definite nature of what is being referred to.
some
Indicates an unspecified amount or number, suitable when the exact quantity isn't important.
a few specific
This alternative is more precise, specifying a small number of particular items.
several specific
Implies more than a few but less than many, emphasizing a limited and defined set.
a number of specific
Indicates an indefinite but not large quantity, with emphasis on distinct items.
select
Highlights the act of choosing specific items from a larger group.
FAQs
Why is "some certain" considered grammatically incorrect?
The phrase "some certain" is generally considered redundant because both words serve to limit or specify a noun. Using "certain" alone usually suffices. Ludwig AI confirms that this phrase is not correct.
When is it appropriate to use "some" instead of "some certain"?
Use "some" when you want to indicate an unspecified quantity or number. For example, "There are "some issues" that need to be addressed."
What are better alternatives to "some certain" in formal writing?
In formal writing, it's best to use more precise language. Instead of "some certain", consider using alternatives like "certain", "specific", or "particular" depending on the context.
How does using "some certain" affect the clarity of my writing?
Using "some certain" can make your writing less clear and more wordy. Choosing stronger, more concise language will enhance the impact and precision of your message.
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
2.8/5
Expert rating
Real-world application tested