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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
the condition when
Grammar usage guide and real-world examplesUSAGE SUMMARY
The part of the sentence 'the condition when' is correct and usable in written English.
You can use it to refer to a particular condition, for example: "The condition when the temperature is below freezing can be dangerous."
✓ Grammatically correct
Science
News & Media
Formal & Business
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
But many children are being diagnosed with the condition when they have other problems.
News & Media
Sometimes the employer is aware of the condition when they do this, sometimes they're not.
News & Media
Scrapbook Her own mother developed the condition when she was in her 70s.
News & Media
Dr. Sherlock helped improve understanding of the condition when she began using liver biopsies -- previously just a research tool -- to diagnose the condition.
News & Media
The best performance is achieved under the condition when agents use individual memory as their primary information source, and simultaneously use social memory as their searching guidance.
Science
Hyperbilirubinemia is the condition when bilirubin exceeds normal concentration in body (19.80 mg/mL in newborns and 1.19 × 10−2 mg/mL in adults).
Science
When both SFRP2 and WNT16B were withdrawn from the full DDSP spectrum, the consequence was similar to that caused by CM from the condition when only WNT16B was eliminated.
Science & Research
However, when SFRP2 and WNT16B were co-expressed in fibroblasts (PSC27-WNT16B-SFRP2), the resulting CM caused remarkable elevation of TCF/LEF activities, with signals even higher than those of the condition when WNT16B was produced alone PSC27-WNT16BB).
Science & Research
She added that the wording of the original statement "implies that the carriage driver or other stakeholder was aware of the condition," when in fact there was "no evidence of cruelty or neglect".
News & Media
The maximum COD removal was achieved at the condition when the influent COD was within the range of 4250 5250 mg/l and initial BA was more than 1100 mg CaCO3/l.
Science
The condition when a singular system subject to point delays is regular independent of time delays is given and it can be easily tested with numerical or algebraic methods.
Science
Expert writing Tips
Best practice
Consider whether a more concise alternative, such as "when" or "in cases where", might improve the flow and readability of your sentence.
Common error
Avoid using "the condition when" in situations where a simpler construction would suffice. Overusing this phrase can make your writing sound verbose. For example, instead of writing, "The condition when the light is dim makes it hard to see", you could write, "When the light is dim, it is hard to see."
Source & Trust
83%
Authority and reliability
4.4/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the condition when" functions as a relative clause introducer, setting the stage for a description of a specific state or circumstance. It is used to provide context or specify under which circumstances a particular outcome or situation occurs. This is seen in Ludwig's examples from scientific and news sources.
Frequent in
Science
48%
News & Media
32%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "the condition when" is a grammatically correct and frequently used phrase, as confirmed by Ludwig, that serves to introduce specific circumstances or states. While highly versatile, it appears most often in scientific and news-related contexts. When writing, remember that it's best to use this phrase when you want to add a specific nuance about conditions or circumstances, and that in some cases the simpler word "when" may be more concise. Consider using alternatives like "the situation in which" or "the case where" to provide variety in your writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the situation in which
Replaces 'condition' with 'situation', emphasizing the circumstances at hand.
the case where
Substitutes 'condition' with 'case', implying a specific instance or scenario.
the instance that
Replaces 'condition' with 'instance', highlighting a particular occurrence.
under circumstances where
Adds 'under circumstances' for more emphasis on the context.
in a situation that
Similar to 'the situation in which' but uses a slightly different structure.
when this occurs
Shortens the phrase, focusing directly on the occurrence of something.
the time that
Replaces 'condition' with 'time', focusing on a point in time.
during instances of
Emphasizes the duration and occurrence of the condition.
the event in which
Focuses on a specific event rather than a general condition.
the scenario under which
Highlights the set of conditions that create a particular scenario.
FAQs
How can I use "the condition when" in a sentence?
Use "the condition when" to introduce a specific circumstance or state. For example, "The maximum COD removal was achieved at the condition when the influent COD was within the range of 4250–5250 mg/l."
What are some alternatives to "the condition when"?
Alternatives include "the situation in which", "the case where", or simply "when", depending on the context. The best choice depends on the specific meaning you wish to convey.
Is it always necessary to use "the condition when", or can I use just "when"?
In many cases, using just "when" is more concise and equally effective. Use "the condition when" only if you want to emphasize the specific circumstance being described.
What's the difference between "the condition when" and "in the event that"?
"The condition when" refers to a general state or situation, while "in the event that" implies a specific possible occurrence. For example, "The condition when it rains is that the streets get wet" versus "In the event that it rains, the game will be canceled."
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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
83%
Authority and reliability
4.4/5
Expert rating
Real-world application tested