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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 source of that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the source of that" is correct and usable in written English.
It can be used when referring to the origin or cause of something previously mentioned. Example: "I need to know the source of that information before I can trust it."
✓ Grammatically correct
News & Media
Science
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
I remember the source of that.
News & Media
Did you have any similar moments growing up? _ I remember the source of that.
News & Media
People like the idea of just giving out food but don't necessarily want to deal with the source of that.
News & Media
What is the source of that faith?
News & Media
And the source of that growth?
News & Media
What was the source of that riling?
News & Media
Notice the source of that quote.
News & Media
The source of that unease is not difficult to find.
News & Media
And the source of that irony is Geithner himself.
News & Media
"But voters know less about the source of that funding".
News & Media
The activist did not reveal the source of that information.
News & Media
Expert writing Tips
Best practice
When using "the source of that", ensure the "that" clearly refers to something previously mentioned to avoid ambiguity.
Common error
Avoid using "the source of that" if the context doesn't make it immediately clear what "that" refers to. Rewrite the sentence to specify the subject directly.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The source of that functions as a noun phrase used to inquire about or identify the origin, cause, or basis of something previously mentioned. As Ludwig AI indicates, it's a common phrase often used in questions or statements concerning origins.
Frequent in
News & Media
65%
Science
15%
Formal & Business
10%
Less common in
Academia
5%
Wiki
3%
Encyclopedias
2%
Ludwig's WRAP-UP
In summary, the phrase "the source of that" is a common and grammatically sound expression used to inquire about or identify the origin, cause, or basis of something previously mentioned. As Ludwig AI highlights, it's versatile and appears frequently in news, science, and formal business contexts. While alternatives like "the origin of that" or "the cause of that" exist, "the source of that" provides a direct and clear way to seek or provide information about origins. When employing this phrase, ensure clarity by making sure that "that" has a clear and immediate reference. The phrase is generally neutral in tone, making it appropriate for a variety of informative contexts.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the origin of that
Replaces "source" with "origin", emphasizing the point of commencement or derivation.
the cause of that
Substitutes "source" with "cause", focusing on the reason why something happens.
the reason for that
Replaces "source" with "reason", highlighting the justification or explanation for something.
where that comes from
Uses an interrogative structure to inquire about the origin or derivation of something.
the root of that
Emphasizes the fundamental or underlying reason for something.
the basis of that
Focuses on the foundation or groundwork upon which something is based.
what underlies that
Asks about the hidden or less obvious factors contributing to something.
what's behind that
Implies a concealed motive or influence affecting something.
the wellspring of that
Emphasizes an abundant and continual source or origin.
the fountainhead of that
Similar to "wellspring", highlighting a primary and prolific source.
FAQs
How can I use "the source of that" in a sentence?
Use "the source of that" to refer back to something previously discussed, indicating you are now asking about or identifying its origin. For example, "The data shows a significant increase in sales. What is "the source of that" increase?"
What's a more formal alternative to "the source of that"?
In more formal contexts, you could use "the origin of that", "the cause of that", or "the basis for that". These alternatives maintain a similar meaning while sounding more sophisticated.
Is it always necessary to use "the source of that"?
No, it isn't always necessary. Sometimes, being more direct and specific can improve clarity. Instead of "the source of that", consider rephrasing to directly state the origin or cause if it makes the sentence clearer.
How does "the source of that" differ from "the result of that"?
"The source of that" refers to the origin or cause of something, while "the result of that" refers to the consequence or outcome. They are opposite in terms of cause and effect.
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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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested