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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
causes is that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "causes is that" is not correct in English and does not make sense as it stands.
It may be intended to connect a cause to an effect, but it requires rephrasing for clarity and grammatical accuracy. Example: "One of the reasons for the decline in sales is that customer preferences have changed."
⚠ May contain grammatical issues
News & Media
Science
Formal & Business
Alternative expressions(20)
another reason why
a further explanation is that
another is the fact that
another reason is that
another cause is that
another point is that
reason is that
an additional reason is that
another essence is that
another are that
another rationale is that
something better is that
another justification is that
a further reason is that
the explanation for this is
another excuse is that
cause is that
the primary reason is
the reason is that
the main cause is that
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
14 human-written examples
Another bit of information linking genetic and environmental causes is that researchers have found that too much alpha-synuclein can lead to oxidative damage.
News & Media
All Sharma would say about personal causes is that "we're seeing activity across all of these categories, which is why we have them".
News & Media
The reason for such a large variation between studies could relate to varying disease severity, but one of the main causes is that neuronal loss is not homogenous throughout the nbM.
Science
As recent research has shown, the problem with celebrity causes is that they tend to de-politicise activism.
News & Media
The first of the big causes is that people everywhere are living far longer than they used to.
News & Media
The main reason I didn't delve into startups like Causes is that they didn't seem central to the life and work of Silicon Valley.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
46 human-written examples
The second cause is that contract rights in Latin America are generally weak and hard to enforce.
News & Media
For Malebranche, a cause is that between which and whose effect there is a necessary connection.
Science
The single cause was that debt grew faster than income.
News & Media
He felt that one of the causes was that the right people weren't working on the right categories.
News & Media
The real cause is that it wasn't coined until – amazingly – May of this year.
News & Media
Expert writing Tips
Best practice
When aiming to explain why something happened, use grammatically correct phrases like "the reason is that" or "the main cause is that" instead of "causes is that".
Common error
Do not use "causes is that" when trying to indicate the reason for something. This phrase is grammatically incorrect. Always use alternatives such as "the reason is that" or "the cause is that" to maintain clarity and correctness in your writing.
Source & Trust
80%
Authority and reliability
2.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "causes is that" is intended to function as a causal connector, linking an event or situation to its underlying reasons. However, as Ludwig AI points out, it is grammatically incorrect and requires rephrasing to properly convey its intended meaning. The corrected phrase introduces a cause or explanation.
Frequent in
News & Media
40%
Science
40%
Wiki
10%
Less common in
Formal & Business
10%
Science
0%
News & Media
0%
Ludwig's WRAP-UP
In summary, while the phrase "causes is that" aims to connect events with their reasons, it's grammatically flawed and should be avoided in favor of correct alternatives. Ludwig AI confirms this, recommending phrases like "the reason is that" or "the main cause is that". Although examples can be found across various sources, including news and scientific publications, its incorrect structure makes it unsuitable for formal writing. To ensure clear and effective communication, especially in professional and academic contexts, prioritize grammatically sound expressions to convey causality.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the reason is that
Replaces "causes" with "reason" to create a grammatically sound structure that expresses explanation.
the main cause is that
Adds "main" before "cause" to emphasize primary causality, maintaining grammatical correctness.
a major factor is that
Substitutes "causes" with "factor" to denote a contributing element instead of a direct cause.
one reason is that
Indicates that there are multiple reasons, with the phrase highlighting one of them.
the primary reason is
Highlights the main reason or explanation for something.
the underlying reason is that
Emphasizes a deeper, less obvious explanation.
one contributing factor is
Identifies a factor that contributes to a particular result or situation.
an important reason is that
Highlights a significant reason among others.
the explanation for this is
Provides a straightforward explanation, shifting the focus from cause to explanation.
the root cause is that
Focuses on the fundamental cause of an issue or problem.
FAQs
What's a grammatically correct way to start a sentence explaining the cause of something?
Instead of using the incorrect phrase "causes is that", begin your sentence with phrases like "the main "cause is that"" or "the primary "reason is that"" for grammatical accuracy.
Can I use "causes is that" in formal writing?
No, "causes is that" is not appropriate for formal writing. Opt for more polished phrases such as "the explanation is that" or "a significant "factor is that"".
What are some alternatives to "causes is that" that I can use in everyday conversation?
In casual conversation, you can say "the thing is" or "basically" to introduce an explanation. However, for clearer communication, "the reason is" is always a good choice.
How does using "the reason is that" differ from "causes is that"?
"The reason is that" provides a grammatically sound way to explain something, while "causes is that" is considered incorrect. Therefore, "the reason is that" clearly indicates the explanatory nature of the statement.
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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
80%
Authority and reliability
2.5/5
Expert rating
Real-world application tested