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 notion
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that notion" is correct and usable in written English.
You can use it when referring to a specific idea or concept that has been previously mentioned or is understood in the context. Example: "I find that notion quite intriguing, as it challenges conventional thinking."
✓ Grammatically correct
News & Media
Science
Academia
Alternative expressions(7)
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
We're challenging that notion".
News & Media
Others dismissed that notion.
News & Media
The Sands lawyers opposed that notion.
News & Media
James further dispelled that notion Saturday.
News & Media
Ms. Shahidi confirmed that notion: "Trust me.
News & Media
A surprising new study challenges that notion.
Science & Research
Williams rejects that notion.
News & Media
But the defense attorneys dismissed that notion.
News & Media
But Girardi dismissed that notion.
News & Media
"I absolutely reject that notion.
News & Media
"This rejects that notion entirely".
News & Media
Expert writing Tips
Best practice
Use "that notion" when you want to refer back to a specific idea or concept that has already been introduced in the text or conversation. This ensures clarity and avoids ambiguity.
Common error
Avoid using "that notion" too frequently in casual conversation or informal writing. While grammatically correct, it can sound overly formal or pretentious. Opt for simpler alternatives like "that idea" or "that thought" in less formal settings.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that notion" functions as a demonstrative phrase, pointing back to a specific idea or concept already introduced or understood within a particular context. It serves to connect a current statement with a previously established idea, as seen in Ludwig examples where various sources either challenge, reject, or confirm "that notion". Ludwig AI states that this is a correct phrase.
Frequent in
News & Media
54%
Academia
23%
Science
13%
Less common in
Formal & Business
5%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, "that notion" is a grammatically sound and frequently used phrase that serves to refer back to a previously mentioned idea or concept. Ludwig AI confirms its correctness. While it appears across various contexts, it is most commonly found in news and media, academic, and scientific writing. When using this phrase, ensure that the referenced idea is clear to your audience to avoid ambiguity. While appropriate for formal writing, consider using simpler alternatives like "that idea" in more casual settings.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that idea
Replaces "notion" with a more common and general term for a thought or concept.
that concept
Similar to "that idea", but often used in more formal or technical contexts.
that belief
Emphasizes the element of conviction or acceptance associated with the idea.
that assumption
Highlights the speculative or presupposed nature of the idea.
that proposition
Suits formal or academic contexts where an idea is presented for consideration.
that hypothesis
Emphasizes that the idea requires further investigation to be confirmed.
that perspective
Focuses on the particular viewpoint or angle from which an idea is considered.
that line of reasoning
Highlights the logical progression or argumentation behind the idea.
that conviction
Expresses the holding of a firmly held belief.
that point of view
Indicates a particular way of considering a matter.
FAQs
What does "that notion" mean?
The phrase "that notion" refers to a specific idea, concept, or belief that has been previously mentioned or is understood within the current context. It's a way to point back to something already established in the discussion.
What are some alternatives to using "that notion" in writing?
Depending on the context, you could use alternatives like "that idea", "that concept", "that belief", or "that assumption". The best choice depends on the specific nuance you want to convey.
Is it correct to use "that notion" in formal writing?
Yes, "that notion" is perfectly acceptable and grammatically correct for formal writing. It provides a clear and concise way to refer back to a previously discussed idea without being overly repetitive.
How is "that notion" different from "this notion"?
"That notion" typically refers to an idea introduced earlier in the conversation or text, creating distance. "This notion" usually points to an idea being introduced or currently under discussion, implying closeness or immediacy.
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested