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
is is
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is is" is not correct in standard written English.
It may occur as a typographical error or in informal contexts, but it does not convey a coherent meaning. Example: "The only thing I can say is is that we need to improve our communication."
⚠ May contain grammatical issues
News & Media
Science
Wiki
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
58 human-written examples
What is, is.
News & Media
What it is, is hot.
News & Media
All that is, is well".
News & Media
WHO is is John Schwartz?
News & Media
What there is, is passion.
News & Media
Real life is, is — Kinetic?
News & Media
Because whatever is, is.
News & Media
Who is is targeting?
News & Media
Arriving is, is triumphant.
News & Media
The question is, is it worth it?
Encyclopedias
"The question is, is it legitimate?
News & Media
Expert writing Tips
Best practice
When you find yourself writing "is is", pause and consider what you're trying to emphasize. Choose a more precise word to convey your meaning.
Common error
Be cautious of overemphasizing through redundancy. Instead of writing "the problem is is complex", opt for a more concise statement, such as "the problem is complex" or "the problem is indeed complex". This will make your writing clearer and more impactful.
Source & Trust
86%
Authority and reliability
2.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is is" typically functions as a grammatical error where a linking verb is unintentionally repeated. Ludwig AI highlights that it does not conform to standard English grammar, serving often as a redundancy. Examples show this repetition occurs across various contexts, but doesn't validate its usage.
Frequent in
News & Media
39%
Science
31%
Wiki
12%
Less common in
Encyclopedias
3%
Formal & Business
3%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "is is" is generally grammatically incorrect and should be avoided in formal writing. While Ludwig provides several examples where the phrase appears, these instances are typically errors or informal usages. As Ludwig AI suggests, replacing the redundant phrase with alternatives like "is that" or restructuring the sentence will improve clarity and correctness. The expert rating reflects this, emphasizing the importance of avoiding this construction in favor of more precise and grammatically sound options. Therefore, it's best to proofread carefully and choose more appropriate phrasing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is that
Replaces the redundant phrase with a more grammatically correct linking verb construction.
is indeed
Adds emphasis while maintaining grammatical correctness, suitable for confirming a statement.
is actually
Introduces a clarification or surprising element to the statement.
is in fact
Emphasizes the truth or reality of a situation.
that is
Clarifies a previous statement, providing more detail or explanation.
it is
Begins a clause to emphasize a condition or state.
this is
Highlights the current situation or topic under discussion.
is certainly
Expresses confidence or assurance about something's state.
is truly
Emphasizes the genuine nature of something.
is definitely
Indicates a clear and unquestionable state.
FAQs
How can I correct the phrase "is is" in my writing?
Is there any situation where "is is" would be grammatically correct?
No, the phrase "is is" does not follow standard English grammar rules. It's generally a mistake or an instance of informal, repetitive speech but, technically, it could be correct in some programming language.
What are some alternative phrases to use instead of "is is"?
Depending on the context, you could use phrases like "is actually", "in fact", or simply revise the sentence to eliminate the redundancy. The best choice depends on the specific meaning you want to convey.
How does using "is is" affect the clarity of my writing?
Using "is is" can make your writing sound unprofessional and confusing. It introduces unnecessary redundancy, which distracts the reader and weakens your message. Clear and concise writing is always preferable.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
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
2.1/5
Expert rating
Real-world application tested