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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
that is the question
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "that is the question" is correct and usable in written English.
It is often used to express uncertainty or to highlight a dilemma, particularly in philosophical or rhetorical contexts. Example: "To be or not to be, that is the question."
✓ Grammatically correct
News & Media
Academia
Formal & Business
Alternative expressions(20)
that is the word
the crucial point is
that's the purpose
the main concern is
that's the objective
consequently
that is the dilemma
that is the idea
that is the goal
the central question is
this is the reason
that is the situation
for that reason
hence
the reason is
that's the aim
that's the goal
that is the plan
that is the intention
the heart of the matter is
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
44 human-written examples
Lateral or vertical — that is the question!
Academia
For black fans, that is the question.
News & Media
DAVID DENBY: God, that is the question.
News & Media
A pattern -- that is the question.
News & Media
To tan or not to tan that is the question.
Academia
To gag or to weep, that is the question.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
16 human-written examples
After the Convention, that was the question.
News & Media
That was the question.
News & Media
That's the question.
News & Media
"Ah, that's the question.
News & Media
That's the question confronting Republicans.
News & Media
Expert writing Tips
Best practice
Use “that is the question” to introduce a critical dilemma or uncertainty, prompting deeper consideration of the issue at hand.
Common error
Avoid using “that is the question” too frequently, as it can sound repetitive. Vary your language by employing alternatives like “the central issue is” or “the real question is” for a more nuanced tone.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "that is the question" functions as a declarative statement used to introduce a critical point of consideration or uncertainty. As evidenced by Ludwig, it commonly serves to highlight a dilemma requiring careful thought.
Frequent in
News & Media
40%
Academia
30%
Formal & Business
10%
Less common in
Science
10%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
In summary, "that is the question" is a grammatically correct and frequently used phrase to introduce a significant dilemma or uncertainty. As Ludwig AI confirms, it is commonly found in News & Media and Academic contexts, serving to prompt reflection and emphasize the importance of a decision. While versatile, it should be used judiciously, with alternatives like "the central issue is" available for variety. Its usage spans both formal and informal registers, maintaining a neutral tone overall.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the key question to consider is
Specifies that reflection and thought are needed to address the query.
the central question is
Highlights the core problem needing resolution, using a more direct approach.
the real issue is
Directly points to the most important problem at hand, simplifying the sentence.
the crucial point is
Identifies the most important element to consider.
that remains the key issue
Focuses on the unresolved nature of the problem, emphasizing its continued importance.
the main concern is
Focuses on what is most worrisome or significant.
the fundamental problem is
Emphasizes the underlying and essential nature of the issue.
the heart of the matter is
Highlights the most important aspect of the issue.
what needs to be determined is
Shifts the focus to the act of finding a conclusive answer or resolution.
what it all boils down to is
Indicates the most basic or essential aspect of a situation.
FAQs
How can I use "that is the question" in a sentence?
Use "that is the question" to highlight a central dilemma or uncertainty. For example, "Whether to invest in new equipment or hire more staff, "that is the question"".
What are some alternatives to "that is the question"?
You can use alternatives like "the central issue is", "the real question is", or "the key question to consider is" depending on the specific context.
Is "that is the question" formal or informal?
The phrase "that is the question" can be used in both formal and informal contexts, depending on the tone and subject matter of the discussion. It is generally perceived as more thoughtful or rhetorical.
When is it appropriate to use "that is the question"?
It's appropriate to use “that is the question” when you want to emphasize a significant decision or problem that requires careful consideration. You can use alternatives like "what it comes down to" or "the crucial point is".
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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
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested