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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
which is so
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which is so" is correct and usable in written English.
It can be used to emphasize a statement or to confirm something that has been previously mentioned. Example: "The evidence presented in the report is compelling, which is so."
✓ Grammatically correct
News & Media
Academia
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
60 human-written examples
Which is so disappointing".
News & Media
"Which is so irresponsible.
News & Media
Which is so stupid.
News & Media
We're protecting something which is so valuable.
News & Media
Which is so rare now, you know.
News & Media
And the silence, which is so rare".
News & Media
Not soccer, which is so ordinary.
News & Media
Which is so completely not true.
News & Media
"Which is so weird," she says.
News & Media
"Which is so bittersweet for a Jewish girl".
News & Media
It's a world which is so rooted in the culture.
News & Media
Expert writing Tips
Best practice
Use "which is so" to add emphasis to a point that directly relates to the previous statement. It creates a smooth transition while highlighting the importance of the information.
Common error
Avoid using "which is so" excessively in formal academic or professional writing. While grammatically correct, it can sometimes sound informal or conversational. Opt for more precise and sophisticated linking words like 'therefore' or 'consequently'.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which is so" functions as a relative clause that adds emphasis or explanation to the preceding statement. It connects two ideas, highlighting the degree or extent of a particular quality or characteristic. Ludwig confirms that this phrase is used to connect and emphasize ideas.
Frequent in
News & Media
53%
Academia
24%
Science
12%
Less common in
Formal & Business
6%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "which is so" serves as a versatile tool for emphasizing and connecting ideas, most commonly found in news and media contexts. As Ludwig AI confirms, the phrase is grammatically correct and widely used, although its informal tone suggests limiting it in strict academic or professional settings. Alternatives like "therefore" or "consequently" offer more formal substitutes. By understanding its grammatical function, communicative purpose, and typical contexts, writers can effectively integrate "which is so" to enhance clarity and impact in their writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
which explains why
Highlights the reason behind a situation or event, providing clarification.
that is why
Focuses on the causal relationship, emphasizing the reason or consequence.
that's why it is
Emphasizes the reason or explanation for something, using a more direct tone.
that's because
Provides a direct reason or cause for something, using a more conversational tone.
and therefore
Indicates a logical conclusion or result based on the preceding statement.
consequently
Indicates that something is a direct result or outcome of what was previously mentioned.
as a result
Highlights the outcome or effect of a preceding action or situation.
it follows that
Suggests a logical deduction or implication from the previous statement.
hence
Indicates a logical consequence or conclusion, often used in formal contexts.
it implies that
Suggests that something is indirectly stated or suggested by the preceding information.
FAQs
How can I use "which is so" in a sentence?
The phrase "which is so" is used to add emphasis or provide further explanation to a preceding statement. For example: "The task requires precision, "which is so" difficult to achieve."
What are some alternatives to "which is so"?
Depending on the context, you can use alternatives like "therefore", "consequently", or "as a result" to convey a similar meaning.
Is it grammatically correct to start a sentence with "which is so"?
While it's grammatically correct to include "which is so" within a clause, it's generally not used to start a sentence. It typically follows a statement that it elaborates on.
What is the difference between "which is so" and "that is so"?
"Which is so" connects and emphasizes a previous clause, while "that is so" stands alone as a statement of affirmation or agreement. For example, "The claim is difficult to prove, which is so." versus "That is so, I agree with 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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested