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
reason by
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "reason by" is not commonly used in written English and may not be considered standard.
It could be used in contexts where one is discussing the process of reasoning or deriving conclusions based on certain premises or principles. Example: "To solve the problem, we need to reason by examining the underlying assumptions."
Science
News & Media
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
59 human-written examples
Reason, by contrast, belongs to the fourth class, as the cause of good mixtures.
Science
Stands to reason, by common sense.
News & Media
Assault on Reason, by Al Gore 28.
News & Media
You don't win converts to reason by applauding unreason.
News & Media
But can an objective reason, by itself, motivate selfless generosity?
News & Media
To address such problems, it was necessary to reason by analogy from one situation to another.
News & Media
Whatever the reason, by the 18th century stripes were no longer held in such low regard.
News & Media
We said it first, for some reason, by not just years but a couple of centuries.
News & Media
The men smile and nod, impressed for some reason by this information.
News & Media
THE END OF FAITH: Religion, Terror, and the Future of Reason, by Sam Harris.
News & Media
7 8 4 BRIDGET JONES: The Edge of Reason, by Helen Fielding.
News & Media
Expert writing Tips
Best practice
When using "reason by", ensure the context clearly indicates the method or evidence used for reasoning. For enhanced clarity, consider replacing "reason by" with stronger verbs such as "deduce", "infer", or "conclude" followed by "from".
Common error
Avoid using "reason by" excessively in formal documents. Opt for more precise and commonly accepted phrases like "deduce from" or "infer from" to maintain a professional tone.
Source & Trust
85%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "reason by" functions as a verb phrase describing a method or process of reaching a conclusion. It indicates that a conclusion is derived or justified through a specific mode of reasoning. Ludwig shows examples in both academic and news contexts.
Frequent in
Science
40%
News & Media
40%
Formal & Business
20%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "reason by" is a grammatically acceptable phrase used to describe the process of reaching a conclusion through a specific method or evidence. While valid, Ludwig AI suggests that it is not the most common or stylistically preferred choice, with alternatives like "deduce from" or "infer from" often providing greater clarity. Predominantly used in scientific and journalistic contexts, it carries a neutral to formal tone. Therefore, while grammatically sound, writers should carefully consider whether a more direct alternative might better suit their intended meaning.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
deduce from
Focuses on drawing a conclusion logically from given premises.
infer from
Emphasizes drawing a conclusion based on evidence and reasoning.
conclude based on
Highlights the act of reaching a conclusion after considering certain information.
determine through reasoning
Emphasizes the process of using logic and thought to arrive at a decision.
as a consequence of
Focuses on the result or outcome directly caused by something.
by virtue of
Highlights that something is true or possible because of a particular quality or feature.
on the grounds of
Suggests a formal justification or basis for a decision or belief.
understand through logic
Focuses on gaining comprehension via logical processes.
as inferred from
Highlights a conclusion derived from indirect evidence.
reasoning based on
Implies a structured thought process forming the foundation for a conclusion.
FAQs
How can I use "reason by" in a sentence?
While less common, you can use "reason by" to describe the act of reaching a conclusion through a particular method or evidence. For example: "To address such problems, it was necessary to "reason by analogy" from one situation to another."
What are some alternatives to "reason by"?
Depending on the context, you can use alternatives like "deduce from", "infer from", or "conclude based on".
Is "reason by" grammatically correct?
Yes, "reason by" is grammatically acceptable, but it's not as common or stylistically preferred as other alternatives. Ludwig AI suggests that alternatives may be better suited for many contexts.
When is it appropriate to use "reason by"?
It is appropriate to use "reason by" when emphasizing the method or process of reasoning. However, consider whether alternatives like "deduce from" or "infer from" might provide greater clarity and impact.
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
85%
Authority and reliability
3.8/5
Expert rating
Real-world application tested