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
that concept
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that concept" is correct and usable in written English.
You can use it when referring to a specific idea or notion that has been previously mentioned or is understood in the context. Example: "I find that concept intriguing, as it challenges traditional views on the subject."
✓ Grammatically correct
News & Media
Alternative expressions(5)
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
59 human-written examples
But Mr. Heder said that concept was still in flux.
News & Media
Today, that concept can be multiplied tenfold.
News & Media
Whiting finds that concept amusing.
News & Media
This one hews to that concept.
News & Media
That concept helped shape the Emancipation Proclamation.
News & Media
Otherwise, that concept was pretty elastic.
News & Media
"I don't have that concept.
News & Media
That concept is pretty mindblowing".
News & Media
"I didn't understand that concept.
News & Media
That concept of an us.
News & Media
Even Sudan endorsed that concept.
News & Media
Expert writing Tips
Best practice
Use "that concept" to smoothly refer back to a specific idea introduced earlier in your writing, avoiding repetition and maintaining clarity.
Common error
Avoid using "that concept" repeatedly within a short span. Vary your language by using synonyms or rephrasing to maintain reader engagement and prevent your text from sounding monotonous.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that concept" functions as a demonstrative phrase, specifically a referential pro-form, used to point back to a previously mentioned idea, theory, or notion. Ludwig examples show its role in continuing a line of thought or building upon established information.
Frequent in
News & Media
79%
Formal & Business
9%
Science
4%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "that concept" is a frequently used and grammatically sound demonstrative phrase that refers to a previously mentioned idea. According to Ludwig, its usage spans across various contexts, with primary presence in news and media. While Ludwig examples point to its versatility, it's best practice to ensure its referent is clear to avoid ambiguity, and to avoid overusing it in close proximity. By considering these guidelines, you can effectively incorporate "that concept" into your writing for enhanced clarity and coherence.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
this idea
Replaces "concept" with "idea", a more general term for a thought or notion; creates a slightly less formal tone.
that notion
Substitutes "concept" with "notion", implying a less concrete or developed idea; slightly more formal.
that principle
Uses "principle" instead of "concept", suggesting a fundamental truth or belief underlying the idea.
this theory
Replaces "concept" with "theory", implying a more structured and potentially testable explanation.
the aforementioned idea
Adds "aforementioned" to explicitly refer back to an idea already discussed, increasing formality.
the idea in question
Clarifies that the reference is to the specific idea being discussed or debated.
the point being made
Shifts focus to the act of communicating the idea, rather than the idea itself.
the above concept
Uses "above" to indicate the concept was introduced earlier in the text, similar to "aforementioned" but less formal.
that train of thought
Highlights the sequence or progression of ideas, implying a logical connection.
the essence of that
Focuses on the core or most important part of the concept, emphasizing its central meaning.
FAQs
How can I use "that concept" in a sentence?
Use "that concept" to refer back to an idea, theory, or principle that has already been introduced or is understood in the current context. For example: "The study explored the effects of social media on teenagers. "That concept" is crucial for understanding modern communication patterns."
What are some alternatives to "that concept"?
You can use alternatives such as "this idea", "that notion", or "the aforementioned idea" depending on the specific context and desired level of formality.
Is it okay to start a sentence with "that concept"?
Yes, starting a sentence with "that concept" is grammatically correct, especially when it serves as a clear reference to a previously mentioned idea. However, ensure the connection is evident to avoid ambiguity.
What is the difference between "that concept" and "this concept"?
"That concept" typically refers to an idea or notion that has already been discussed or introduced. "This concept" often introduces a new idea or refers to something that is about to be explained. The choice depends on whether you're referring back to something already known or presenting something new.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested