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
their reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "their reason" is correct and usable in written English.
You can use it when referring to a particular person or group's explanation or rationale for something. For example: "The student's parents refused to sign the school permission slip, citing their reason that it was too dangerous."
✓ Grammatically correct
News & Media
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
Their reason?
News & Media
Their reason was simple.
News & Media
Their reason for going?
News & Media
Last night bona fided their reason".
News & Media
"I don't understand their reason," Cervelli said.
News & Media
What is their reason for fear?
News & Media
Food was their reason for living.
News & Media
They have lost their reason for existing.
News & Media
Their reason is America's and the world's problem.
News & Media
Their reason for doing so was one of conservation.
News & Media
But their reason is personal: their son is buried there.
News & Media
Expert writing Tips
Best practice
When using "their reason", ensure it clearly refers to the explanation or justification provided by a specific group. Avoid ambiguity by explicitly stating who 'they' are.
Common error
Avoid assuming you know "their reason" without explicit confirmation. Always attribute the reason to the correct source to prevent misunderstandings or misrepresentations.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "their reason" functions as a noun phrase acting as a subject complement or object in a sentence. It identifies the cause, explanation, or justification offered by a group, as confirmed by Ludwig's examples.
Frequent in
News & Media
40%
Science
30%
Formal & Business
15%
Less common in
Academia
5%
Encyclopedias
5%
Wiki
5%
Ludwig's WRAP-UP
The phrase "their reason" is a common and grammatically sound way to refer to the explanation or justification provided by a group. As confirmed by Ludwig, it is versatile, appearing frequently in news, science, and formal contexts. When using this phrase, ensure clarity by explicitly identifying the group to whom the reason belongs. While alternatives like "their rationale" or "their motive" exist, "their reason" provides a direct and understandable way to convey a group's rationale.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
their rationale
Focuses on the justification or underlying logic behind their actions, similar to reason but emphasizes a structured explanation.
their motive
Highlights the driving force or intention behind their behavior, emphasizing the 'why' of their actions.
their justification
Emphasizes the act of proving or showing something to be right or reasonable, adding a layer of defense or validation.
their explanation
Refers to a statement or account making something clear, differing slightly by focusing on the clarification aspect.
their grounds
Indicates the basis or foundation upon which their actions or beliefs are based.
their cause
Highlights the principle, aim, or movement that they support, focusing on a broader objective.
their purpose
Emphasizes the intended outcome or objective of their actions, highlighting the goal they are trying to achieve.
their intent
Focuses on their aim or design, suggesting a deliberate plan or objective.
the source of their actions
Indicates the origin or root cause of their behaviour, emphasizing the underlying influence.
the why behind their actions
Directly questions the motivation behind their actions, inviting a deeper understanding.
FAQs
How can I use "their reason" in a sentence?
You can use "their reason" when referring to the explanation or justification given by a group for a particular action or belief. For example, "The company cited supply chain issues as their reason for the delay."
What are some alternatives to using "their reason"?
Depending on the context, you can use alternatives like "their rationale", "their motive", or "their justification".
Is it grammatically correct to use "their reason"?
Yes, it is grammatically correct to use "their reason" as long as it clearly refers to a group's explanation or justification. Make sure 'their' accurately reflects the group you are referring to.
What's the difference between "their reason" and "the reason"?
"Their reason" refers to a specific group's explanation, while "the reason" is a more general term. For instance, "Their reason for leaving was personal," versus "The reason for the delay is unknown."
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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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested