a key theory

USAGE SUMMARY

The phrase "a key theory" is correct and usable in written English.
It can be used when referring to an important or central theory in a particular field of study or discussion. Example: "In her research, she focused on a key theory that explains the relationship between climate change and biodiversity loss."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

11 human-written examples

A key theory in concrete mix design is maximizing aggregate packing density (PD) of aggregate mixture.

Advanced Powder Technology

A key theory is that it breaks the "fear-tension-pain" cycle noted by obstetrician Grantly Dick Read in 1954 - and no doubt experienced by millions of British mothers since.

The Guardian

American social scientist known for his contributions to a number of fields, including psychology, mathematics, statistics, and operations research, all of which he synthesized in a key theory that earned him the 1978 Nobel Prize for Economics.

Encyclopedia Britannica

Most galling to some members of the Freudian establishment was the suggestion that a key theory Freud had developed in 1895 and later repudiated - the so-called "seduction theory" attributing adult neurosis to childhood sexual abuse - may have been more or less right after all and that Freud may have abandoned it for personal as much as scientific reasons.

The New York Times

The study may overturn a key theory of language evolution.

Science Magazine

Evolution is considered the unifying concept in biology and is also a key theory underlying many areas of human knowledge.

Evolution: Education and Outreach

Human-verified similar examples from authoritative sources

Similar Expressions

49 human-written examples

In that ruling, judges said a key government theory was flawed.

The Guardian - Business

In epistemic logic, a key formal theory for reasoning about knowledge in AI and other fields, different notions of group knowledge describe different ways in which knowledge can be associated with a group of agents.

Artificial Intelligence

Legal analysts say the appeal has a chance, albeit it a slim one, of persuading a panel of three judges either that a key prosecution theory was flawed or that his case ought to have been moved from Enron's home city of Houston.

The Guardian - Business

The course will include an overview of key theories from psychology, sociology, and education, field trips to partnering organizations, and a term-long community-engaged research project focused on designing and/or evaluating a local outreach or educational program that is meant to achieve social and environmental change.

Stanford University

Coördination is a key advantage: in theory, with one firm coördinating every aspect of a given product's features, the result can work better than its uncoördinated rival.

The New Yorker

Expert writing Tips

Best practice

When using "a key theory", ensure it is followed by a clear explanation or application of the theory to provide context and demonstrate its significance.

Common error

Avoid using "a key theory" to describe a concept that is still highly speculative or lacks substantial evidence. Reserve this phrase for well-established and influential theories.

Linguistic Context

The phrase "a key theory" functions primarily as a noun phrase. According to Ludwig AI, the phrase is correct and can be used to refer to an important or central theory in a particular field of study or discussion.

Expression frequency: Uncommon

Frequent in

Science

50%

News & Media

30%

Encyclopedias

20%

Less common in

Academia

0%

Formal & Business

0%

Wiki

0%

Ludwig's WRAP-UP

In summary, the phrase "a key theory" is a grammatically correct and useful expression to denote an important or fundamental theoretical framework. Ludwig AI confirms its validity. It is most commonly found in scientific and news media contexts and carries a neutral to formal tone. When using this phrase, ensure the theory is well-established and its significance is clearly explained. Alternative phrases include "a central concept" or "a fundamental principle". Avoid using it for speculative ideas.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

a central hypothesis

Replaces "theory" with "hypothesis", suggesting a proposition made as a basis for reasoning, without any assumption of its truth.

a core concept

Substitutes "theory" with "concept", focusing on a fundamental idea or principle.

a fundamental principle

Replaces "theory" with "principle", emphasizing a basic truth or foundation.

a cornerstone of the argument

Uses "cornerstone" to highlight the essential and indispensable nature of the theory within an argument.

a major tenet

Employs "tenet" to refer to a principle or belief held as true, replacing "theory".

a primary assumption

Swaps "theory" with "assumption", indicating something taken for granted or supposed to be true.

an essential element

Focuses on the theory as an indispensable part of a larger framework or system.

a critical component

Highlights the theory's role as a necessary part of a whole, similar to "essential element".

a significant paradigm

Replaces "theory" with "paradigm", suggesting a widely accepted example, model, or pattern.

a pivotal concept

Emphasizes the theory's crucial importance and influence, similar to "key concept".

FAQs

How can I use "a key theory" in a sentence?

You can use "a key theory" to introduce an important concept or framework, such as: "A key theory in economics is the law of supply and demand."

What are some alternatives to using "a key theory"?

Alternatives include: "a central concept", "a fundamental principle", or "a core idea", depending on the context.

Is it appropriate to use "a key theory" when discussing speculative ideas?

It's better to avoid using "a key theory" for speculative ideas. Instead, consider using phrases like "a potential explanation" or "a proposed model".

What makes a theory "key"?

A "key" theory is typically one that is influential, widely accepted, and fundamental to understanding a particular subject or field. It often provides a foundational framework for further research and analysis.