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
the source of this
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the source of this" is correct and usable in written English.
It can be used when referring to the origin or cause of something being discussed or presented. Example: "In order to understand the implications of this study, we must first identify the source of this information."
✓ Grammatically correct
News & Media
Science
Alternative expressions(20)
the origin of this
the cause of this
the reason for this
the basis of this
the reason of this
the excuse for this
the argument for this
the rationale for this
the motive for this
the aim of this
the gift of this
the result of this
the basis for this
the justification for this
why this happened
the reasons for this
the grounds for this
the reasoning for this
what prompted this
the cause for this
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
"What is the source of this?
News & Media
What is the source of this power?
News & Media
What was the source of this delight?
News & Media
The source of this free market wisdom?
News & Media
What is the source of this evidence?
News & Media
What is the source of this change?
News & Media
The source of this extra energy is of prime importance.
News & Media
But what is the source of this mysterious dark matter?
News & Media
I wanted to know the SOURCE of this pain.
News & Media
"Today you are the source of this power.
News & Media
Some terrorist organizations provided the source of this wrong information.
News & Media
Expert writing Tips
Best practice
When using "the source of this", ensure that "this" clearly refers to a specific element discussed in the preceding context to avoid ambiguity.
Common error
Avoid starting sentences or paragraphs with "The source of this" without explicitly establishing what "this" refers to. Always ensure clarity by either rephrasing to include the subject or preceding it with a clear reference.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the source of this" functions as a noun phrase, typically serving as the subject or object of a sentence. It identifies or inquires about the origin, cause, or basis of something previously mentioned. As Ludwig highlights, it's a grammatically sound and versatile expression.
Frequent in
News & Media
35%
Science
34%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "the source of this" is a versatile noun phrase used to inquire about or identify the origin or cause of something. Ludwig confirms its grammatical correctness and frequent usage, particularly in news, scientific, and formal contexts. While it's generally appropriate, ensuring clarity by clearly defining what "this" refers to is crucial. Alternatives like "the origin of this" or "the reason for this" can be used depending on the desired nuance.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the origin of this
Replaces "source" with "origin", maintaining the focus on where something comes from but with a slightly more formal tone.
the cause of this
Substitutes "source" with "cause", emphasizing the reason or event that leads to a particular outcome.
the root of this
Uses "root" instead of "source", highlighting the fundamental or underlying reason for something.
the reason for this
Emphasizes the rationale or explanation behind a situation or event, shifting from origin to justification.
where this stems from
Introduces a verb-based structure, focusing on the point of origin or development, using a more dynamic expression.
the basis of this
Changes the focus to the foundation or underlying principle upon which something is based.
the wellspring of this
Employs a metaphorical term, "wellspring", suggesting an abundant or continuous source.
what underlies this
Shifts to an interrogative form, probing the hidden or less obvious causes or influences.
the genesis of this
Uses "genesis" to refer to the origin or mode of formation of something
the fount of this
Uses "fount" a literary term for a source or origin.
FAQs
What are some alternatives to using "the source of this" in writing?
You can use alternatives like "the origin of this", "the cause of this", or "the reason for this" depending on the context.
How can I ensure clarity when using the phrase "the source of this"?
To avoid ambiguity, always make sure that "this" has a clear and immediate reference in the preceding sentence or paragraph. Consider rephrasing if the connection isn't obvious.
Is "the source of this" appropriate for formal writing?
Yes, "the source of this" is suitable for formal writing, but depending on context, alternatives like "the origin of this" might sound more sophisticated. Ludwig indicates that this is commonly used in news and media, as well as scientific articles.
What's the difference between "the source of this" and "the origin of this"?
While similar, "the source of this" is a broader term that can refer to any starting point or cause, whereas "the origin of this" often implies a more fundamental beginning or historical root.
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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
4.5/5
Expert rating
Real-world application tested