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 the problem is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the source of the problem is" is correct and usable in written English.
You can use it when identifying or discussing the origin or cause of an issue or difficulty. Example: "After thorough investigation, we concluded that the source of the problem is a lack of communication between departments."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
lack of communication
the reason is
the heart of the matter is
the real reason is
the bottom line is
the cause of the problem is
the problem remains
the problem reside
the problem lives
the problem originates in
the problem is located
the problem stems from
the problem arises
the problem resides
the problem persists
the problem lies
the root of the problem is
problem persists
it is yet to be fixed
it has not yet fixed
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
29 human-written examples
But 37 years after independence, the source of the problem is not so clear.
News & Media
"Just listen to the quality of debate in this country about what the source of the problem is," Fukuyama continues.
News & Media
Until the source of the problem is addressed, obesity will continue to ravage the rest of the child.
News & Media
THERE are plenty of people singling out causes for the collapse of the financial markets, and conveniently, the source of the problem is usually someone else.
News & Media
The source of the problem is Congress, which has slashed the agency's budget by almost 30percentt since the 1980's.
News & Media
If you're looking for the root cause of anything annoying, silly or spurious in the culture of art in 21stcentury Britain the source of the problem is never hard to locate.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
28 human-written examples
The source of the problem was the service box".
News & Media
His assertion that "the source of the problem [is] Mexico's statist economy" is incorrect.
News & Media
But the source of the problem... was the Dalai Lama.
News & Media
Executives said the source of the problem had been fixed.
News & Media
The source of the problem turns out to be the parents' constant bickering.
News & Media
Expert writing Tips
Best practice
When using "the source of the problem is", ensure that what follows clearly and directly identifies the cause or origin of the issue you are discussing. Clarity is key.
Common error
Avoid using "the source of the problem is" followed by a vague statement. Always provide a specific and identifiable cause rather than a general description of the symptoms or effects.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the source of the problem is" functions as a subject complement. It identifies and defines the subject of a sentence, pinpointing the origin or cause of a particular difficulty. As Ludwig indicates, it's grammatically correct and readily understood.
Frequent in
News & Media
40%
Science
32%
Wiki
12%
Less common in
Formal & Business
8%
Encyclopedias
4%
Reference
4%
Ludwig's WRAP-UP
In summary, "the source of the problem is" is a grammatically sound and frequently used phrase for identifying the root cause of an issue. Ludwig's analysis of numerous examples demonstrates its wide applicability across diverse contexts, from news and media to scientific research and general explanations. While maintaining a neutral to professional tone, this phrase effectively directs attention to the origin of the difficulty, facilitating clarity and understanding. Remember to be precise when using the phrase, ensuring that what follows clearly identifies the cause and avoids vague or general statements.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the origin of the issue is
Replaces 'source of the problem' with 'origin of the issue', focusing on the starting point of the difficulty.
the root cause of the difficulty is
Substitutes 'source' with 'root cause', emphasizing the fundamental reason behind the challenge.
the underlying reason for the issue is
Replaces 'source' with 'underlying reason', highlighting a less obvious cause.
the primary driver of the issue is
Replaces 'source' with 'primary driver', shifting the focus to the main factor propelling the problem.
the key factor contributing to the problem is
Substitutes 'source' with 'key factor', pinpointing a significant element that adds to the difficulty.
the heart of the matter is
Replaces the entire phrase with a more idiomatic expression meaning the central point or core of the problem.
the crux of the problem is
Similar to 'heart of the matter', this phrase emphasizes the most crucial part of the difficulty.
the main culprit is
Uses 'culprit' to suggest someone or something is to blame for the problem.
the real reason is
Highlights that what follows is the actual explanation for the issue at hand.
the bottom line is
Introduces a concise summary of what is fundamentally causing the problem.
FAQs
How can I use "the source of the problem is" in a sentence?
Use "the source of the problem is" to clearly identify the origin or cause of a specific issue. For example, "The source of the problem is "lack of communication" between departments."
What are some alternatives to saying "the source of the problem is"?
Alternatives include phrases like "the origin of the issue is", "the root cause of the difficulty is", or "the underlying reason for the issue is".
Is it better to say "the source of the problem is" or "the problem is caused by"?
Both phrases are correct, but "the source of the problem is" directly identifies the origin, while "the problem is caused by" focuses on the effect. The best choice depends on the context and emphasis you want to convey.
Can "the source of the problem is" be used in both formal and informal contexts?
Yes, "the source of the problem is" is appropriate for both formal and informal contexts. However, in more informal settings, you might prefer simpler phrasing like "the reason is".
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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