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
capable of reason
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "capable of reason" is correct and usable in written English.
It is an adjective phrase used to describe someone or something that is capable of thought and making rational decisions. For example, you could say "Humans are the only species on Earth capable of reason."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
rational
logical
reasonable
rationality
capable of rational thought
able to think rationally
able to use logic
endowed with rationality
having the power of reason
cognizant
capable of rationality
capable of ground
capable of consideration
capable of justification
capable of virtue
capable of reasoning
competence of reason
capable of grounding
capacity of reason
ability of reason
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
14 human-written examples
The attention to a youngster's spiritual state intensified at adolescence, when children became simultaneously more capable of reason and less reasonable.
News & Media
I am capable of reason.
News & Media
She argued, apparently outrageously, that women were capable of reason – all they lacked was education.
News & Media
Thinkers from Aristotle to Kant questioned whether women were fully capable of reason.
News & Media
Mr. Brown believes that the truth of Catholicism should be apparent to anyone capable of reason.
News & Media
"You have one person [Robinson] who was so fucking gone, and another man [Kenny] who was trained and capable of reason.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
46 human-written examples
For his part, Aristotle prefers to see slaves treated as children and to use not only orders but also recommendations, as the slave is capable of understanding reasons when they are explained.
Wiki
Young people are naturally more prone to rule-breaking because they are impulsive and generally less capable of reasoned judgment.
News & Media
By responding maturely, you will prove to them that you are capable of understanding their reasons.
Wiki
Aristotle distinguishes two kinds of virtue (1103a1 10): those that pertain to the part of the soul that engages in reasoning (virtues of mind or intellect), and those that pertain to the part of the soul that cannot itself reason but is nonetheless capable of following reason (ethical virtues, virtues of character).
Science
If human beings were potentially capable of applying reason in their lives they would show some sign of learning from what they had done wrong in the past, but history and everyday practice show them committing the same follies over and over again.
News & Media
Expert writing Tips
Best practice
When describing abstract concepts or beings (like AI or theoretical entities), using "capable of reason" lends a sense of sophistication and intellectual capacity.
Common error
Avoid using "capable of reason" when simpler terms like "rational" or "logical" suffice. The phrase is more impactful in formal or philosophical contexts.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "capable of reason" functions primarily as an adjective phrase, modifying a noun to indicate that the noun possesses the ability to think and make judgments based on logic and rationality. Ludwig AI confirms this usage across numerous examples.
Frequent in
News & Media
40%
Science
35%
Wiki
15%
Less common in
Encyclopedias
5%
Formal & Business
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "capable of reason" is a grammatically sound and relatively uncommon phrase that denotes the ability to think logically and rationally. According to Ludwig AI, it is suitable for formal contexts, such as philosophical discussions, news articles, and scientific reports. While simpler alternatives like "rational" or "logical" may suffice in everyday conversation, "capable of reason" lends a more sophisticated tone when describing intellectual capacities. The phrase appears most frequently in News & Media and Science. When employing this phrase, ensure it aligns with the context and avoids overuse in simple situations.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
rational
A more concise adjective describing someone who exhibits reason.
capable of rational thought
Directly replaces "reason" with "rational thought" for emphasis.
able to think rationally
Focuses on the ability to apply logic and rational thought.
able to use logic
Emphasizes the practical application of logical thinking.
endowed with rationality
Highlights the inherent quality of possessing reason.
having the power of reason
Emphasizes the strength and capacity to reason effectively.
possessing cognitive abilities
Broader term that includes various mental processes beyond just reason.
having sound judgment
Highlights the ability to make wise decisions based on reason.
intellectually competent
Focuses on overall intellectual skill and capability.
cognizant
This describes someone aware and knowledgeable, though it doesn't explicitly state reasoning.
FAQs
How can I use "capable of reason" in a sentence?
You can use "capable of reason" to describe entities or beings that possess the ability to think logically and rationally, for example: "Humans are generally considered "capable of reason", unlike other animals".
What is a simpler way to say "capable of reason"?
Alternatives include "rational", "logical", or "reasonable" depending on the specific context. These words convey similar meanings with fewer words.
What is the difference between "capable of reason" and "rationality"?
"Capable of reason" describes the ability to use reason, while "rationality" refers to the quality or state of being rational. One is a capability, the other is a characteristic.
Is it correct to say an animal is "capable of reason"?
While some animals may exhibit problem-solving skills, the extent to which they are "capable of reason" is debated. It's more accurate to say they are capable of learning or problem-solving.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested