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
that is a question
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is a question" is correct and usable in written English.
You can use it when you want to clarify or emphasize that something being discussed is indeed a question. Example: "When you asked if I would join the meeting, that is a question that requires a response."
✓ Grammatically correct
News & Media
Academia
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
Yes, that is a question which Protarchus and I have been long asking.
In this case, that is a question of state evidentiary law.
Academia
That is a question".
News & Media
"That is a question mark.
News & Media
That is a question for another night.
News & Media
That is a question for the S.E.C.
News & Media
And that is a question of price.
News & Media
That is a question worth posing.
News & Media
And that is a question of will.
News & Media
That is a question on everyone's lips.
News & Media
But that is a question that simply cannot be answered.
Academia
Expert writing Tips
Best practice
Consider using variations like "the question is whether" or "a key question is" to add nuance and avoid repetition. However, ensure the alternative maintains the intended emphasis on the questioning aspect.
Common error
Avoid using "that is a question" when you aren't actually posing a question but making a rhetorical statement. Ensure that what follows truly requires an answer or exploration, rather than just serving as emphasis.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is a question" functions as a discourse marker, signaling the introduction or highlighting of a question within a conversation or text. This is supported by Ludwig AI, which shows numerous examples across diverse sources. The examples serve to draw attention to the question.
Frequent in
News & Media
55%
Academia
35%
Formal & Business
5%
Less common in
Science
3%
Encyclopedias
1%
Reference
1%
Ludwig's WRAP-UP
In summary, the phrase "that is a question" serves as a common and versatile tool for introducing and emphasizing questions across various contexts. Ludwig AI validates its grammatical correctness and widespread usage. It is particularly prevalent in News & Media and Academia, signaling the importance of considering the posed question. While grammatically straightforward, writers should ensure it is used appropriately and can replace it with several alternatives depending on the context to improve writing quality. Overall, the phrase effectively directs attention to unresolved matters and prompts further analysis.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
that remains an open question
Emphasizes the unresolved nature of the question.
the question is whether
Directly frames the question as a binary choice.
the central question is
Highlights the importance of the question.
an important question is
Indicates the significance of the question being posed.
a key question is
Stresses the crucial role of the question in a discussion.
the underlying question is
Focuses on the fundamental nature of the question.
the issue at hand is
Shifts focus slightly to the broader issue the question addresses.
the problem is
Frames the question as a problem needing a solution.
one might ask
Introduces the question in a more tentative or speculative way.
it begs the question
Highlights a question that arises logically from a previous statement.
FAQs
How can I use "that is a question" in a sentence?
Use "that is a question" to introduce a problem, inquire something, or to express doubt. Example: "The true value of this approach, "that is a question" for another day."
What are some alternatives to "that is a question"?
You can use alternatives like "that remains an open question", "the question is whether", or "the central question is" depending on the context.
When is it appropriate to use "that is a question" in writing?
It's best to use "that is a question" when you want to emphasize that a specific point or issue requires further examination or analysis. It can be useful in academic writing, news reporting, or any context where clarifying the focus of inquiry is beneficial.
Is "that is a question" formal or informal?
"That is a question" is generally considered neutral in tone and appropriate for both formal and informal contexts. However, the surrounding language and overall style of your writing will influence the perception of formality.
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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