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
a key doctrine
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a key doctrine" is correct and usable in written English.
It can be used to refer to an important principle or belief that is central to a particular system of thought, religion, or legal framework. Example: "The concept of justice is a key doctrine in our legal system that guides the interpretation of laws."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
3 human-written examples
The principle – that a community has the right to give or withhold its consent to proposed projects that may affect lands that they customarily own, occupy or use – is now a key doctrine in international law and central to the RSPO's principles and criteria.
News & Media
At 8 30 pm Bush addressed the nation from the Oval Office in a speech that laid out a key doctrine of his administration's future foreign policy: "We will make no distinction between the terrorists who committed these acts and those who harbor them".
Encyclopedias
The importance of rigorous application of theory to solving social problems has been proffered by Birckmayer and Weiss in their Theory-Based Evaluation approach [ 39], and is a key doctrine for health promotion and health education development and evaluation [ 40].
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
Lefèvre's place on the map of late medieval and Renaissance philosophy is difficult to pinpoint in a single key doctrine or even a single work.
Science
The action itself, and the way its sections both connect and reflect each other, indicate that the movie's key doctrine is the repetition of history.
News & Media
"Race science" was all the rage in Europe in those days, and for students of Central Africa the key doctrine was the so-called Hamitic hypothesis, propounded by John Hanning Speke, the Nile explorer.
News & Media
But it departs substantially on key doctrines, a fact that has often made it a target of hostility.
News & Media
Reports of Epicurus' "Key Doctrines" (see the entry on Epicurus) include instead a contractarian view of justice for mutual protection from harm (reminiscent of Glaucon's initial proposal about justice in Republic Book II, which itself seems to echo the nomos-phusis debate among the sophists).
Science
"A novice to religion who had never read the Bible before would be able to read through this graphic novel trilogy and have an understanding of some of the key narratives as well as key doctrines in the different books," he says, "especially the Epistles.
News & Media
The doctrines concerning the mortality of the individual soul, the eternity of the world, and the existence of a single Mind for the whole human race to the exclusion of individual minds were key doctrines for Averroës; they had some basis but not much in the thought of Aristotle.
Encyclopedias
The meeting had allowed him to check off a couple of important boxes on the score sheet of counter-insurgency doctrine: a "key leader engagement" that offered an opportunity to secure greater control of a "key terrain area".
News & Media
Expert writing Tips
Best practice
When using "a key doctrine", ensure the context clearly establishes what system of thought, belief, or law the doctrine belongs to.
Common error
Avoid using "a key doctrine" without specifying the relevant field or area. Instead of saying "This is a key doctrine", specify "This is a key doctrine in international law" for clarity.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a key doctrine" functions as a noun phrase, identifying an essential principle or belief within a specific framework or system. Ludwig shows its use in legal, philosophical, and general contexts.
Frequent in
News & Media
33%
Science
33%
Encyclopedias
33%
Less common in
Wiki
0%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
The phrase "a key doctrine" is a grammatically sound way to emphasize a fundamental principle or belief within a specific system or context. Ludwig AI confirms its correctness and usability. While relatively rare, this expression appears in various sources like news, science and encyclopedias showing its versatility. To maximize clarity, always specify the context to which the doctrine belongs. Alternatives such as "a central tenet" or "a fundamental principle" can be used depending on the specific nuance you wish to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a central tenet
Replaces "doctrine" with "tenet", emphasizing a core belief or principle.
a fundamental principle
Uses "principle" instead of "doctrine", highlighting a basic truth or proposition.
a core belief
Emphasizes the belief aspect of the doctrine, suitable when the focus is on faith or conviction.
an essential concept
Replaces "doctrine" with "concept", focusing on an important idea or understanding.
a guiding principle
Highlights the role of the doctrine in providing direction or guidance.
a cornerstone of belief
Emphasizes the foundational nature of the belief, suggesting it supports a larger structure.
a basic premise
Focuses on the starting point or assumption upon which a theory or system is based.
a critical element
Highlights the importance of the doctrine as a necessary part of something.
a vital component
Stresses the importance of the doctrine as a necessary part of a larger system or idea.
a central idea
Replaces "doctrine" with a more general term, focusing on the main concept.
FAQs
How can "a key doctrine" be used in a sentence?
You can use "a key doctrine" to emphasize the importance of a principle within a particular system of thought. For example, "The right to free speech is "a key doctrine" in democratic societies".
What are some alternatives to "a key doctrine"?
Alternatives include "a central tenet", "a fundamental principle", or "a core belief", depending on the specific context.
Is it better to say "key doctrine" or "important doctrine"?
"Key doctrine" implies a more foundational or essential element than "important doctrine". "Key" suggests it is indispensable, whereas "important" simply denotes significance.
What is the difference between "a doctrine" and "a key doctrine"?
"A doctrine" refers to any principle or belief, while ""a key doctrine"" specifically highlights a principle or belief that is of utmost importance and centrality within a system or ideology.
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