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
this is so because
Grammar usage guide and real-world examplesUSAGE SUMMARY
"this is so because" is a correct and usable phrase written in English.
You can use it to explain why something is the way it is, or to provide an explanation for something. For example: "This house is so expensive because it is in a desirable neighborhood."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Alternative expressions(19)
this is why
the reason is that
that is why
this is attributable to
this stems from
hence
therefore
consequently
as a result
the explanation for this is
this is best because
this is better because
this is thus because
this is exactly because
this is now because
this is just because
this is particularly because
this is only because
this is really because
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
This is so because, under the conditions in the body, they are almost completely dissociated into their component ions.
Encyclopedias
This is so because, for a large number of cancers, environmental carcinogens work on a background of inherited susceptibilities.
Encyclopedias
This is so, because, as Aristotle adds, form and final cause often coincide.
Science
This is so because mankind is constant people share a common physiology.
Encyclopedias
And perhaps this is so because the Republicans cannot agree on a single tax-reform proposal.
News & Media
This is so because the relationship of energy E and mass m is E = mc2.
Encyclopedias
Mr Rubio says he knows that this is so because he has "seen it with my own eyes".
News & Media
This is so because corrupt countries are often given no chance to build up bureaucracies that can contain corruption.
News & Media
This is so because Africa has 50% higher temperatures than the global average... burning Africa is what is at stake".
News & Media
This is so because drilling muds exhibit time dependent properties.
This is so because the systems are not continuously transmitting.
Expert writing Tips
Best practice
Use "this is so because" to provide a clear explanation or justification following a statement. Ensure the 'this' refers clearly to the preceding idea.
Common error
While grammatically correct, excessive use of "this is so because" can make writing sound stilted or overly formal in casual settings. Consider using simpler alternatives like "that's why" or "because" in informal communication.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "this is so because" functions as a causal connector, linking a statement with its explanation or reason. As confirmed by Ludwig AI, it serves to provide clarity and justification for the preceding statement, establishing a direct cause-and-effect relationship.
Frequent in
Science
45%
News & Media
24%
Encyclopedias
8%
Less common in
Wiki
6%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "this is so because" is a grammatically correct phrase used to introduce an explanation or justification for a preceding statement. Ludwig AI confirms its usability in the English language. While versatile, it tends to appear more frequently in neutral to formal contexts, especially in Science and News & Media, making it suitable for academic, professional, and journalistic writing. When aiming for a more casual tone, consider using alternatives such as "this is why" or simply "because". Remember that clarity is key when employing this phrase: ensure that the "this" refers unambiguously to the prior point to maintain coherence.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
this is why
Offers a more direct and concise explanation.
that is why
Similar to "this is why", but can sometimes imply a slightly more formal tone.
the reason is that
Introduces a reason more explicitly.
this is attributable to
Suggests a cause or origin, often used in more formal contexts.
this stems from
Implies that something originates or develops from a particular source.
hence
A formal and concise way to indicate a consequence or result.
therefore
Indicates a logical conclusion or inference.
consequently
Highlights the result or effect of something.
as a result
Emphasizes the outcome or consequence.
the explanation for this is
Directly states that an explanation will follow.
FAQs
How can I use "this is so because" in a sentence?
Use "this is so because" to introduce an explanation or reason for a previously stated fact or observation. For example, "The experiment failed; this is so because the temperature was not properly regulated."
What are some alternatives to "this is so because"?
You can use alternatives like "this is why", "the reason is that", or "that is why" to convey a similar meaning.
Is "this is so because" formal or informal?
"This is so because" tends to be more formal than simple alternatives like "because" or "that's why". It's suitable for academic writing, formal reports, and situations where a clear and explicit explanation is required.
What's the difference between "this is so because" and "that is why"?
While both phrases express causality, "this is so because" introduces the reason, while "that is why" introduces the consequence. "This is so because" is more explanatory, while "that is why" is more inferential.
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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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested