theory

USAGE SUMMARY

The word "theory" is correct and usable in written English.
It can be used to describe a concept or idea based on reasoning and evidence. For example: "The theory that the universe was created in a single moment is supported by extensive scientific evidence."

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

That, at least, is the theory.

The New York Times - Health

That, at least, was the theory.

The New York Times - Health

In theory, it is possible that gentle nudges will turn into intrusive diktats and the nanny state will drain individual responsibility.

The New York Times

What got me onto this theory was reading that the shoe bomber, a Muslim convert named Richard Reid, had been described by someone who knew him well in England as 'very, very impressionable.' I had already decided that the man was a complete bozo.

The Economist

That is the theory, at least.

The New York Times

In theory, that is.

The New York Times

The principle is simple in theory — Beijing is responsible for the city's defence and foreign affairs; Hong Kong enjoys limited self-governance and civil liberties, including an independent judiciary and unrestricted press.

The Guardian

A few years ago, the question "can there be a soft dictatorship inside the EU?" would have been dismissed as an abstruse hypothetical for students of law and political theory.

The Guardian - Opinion

Far from Cairo's madding crowds, they are in theory an attractive prospect for many Egyptians.

The Guardian

For Herbert Girardet, the author of a dozen books on urban theory, this isn't the most urgent concern.

The Guardian

As against what he sees as Ukip's "unintelligent" approach, Cash has tended to style himself as a "Eurorealist", believing – in theory, at least – that the EU could be so could drastically reformed that he and his Eurosceptic allies would be happy staying in.

The Guardian

Expert writing Tips

Best practice

When discussing a "theory", clearly state its core tenets and the evidence supporting it. Avoid ambiguity by distinguishing between a well-substantiated "theory" and a mere speculation.

Common error

Avoid presenting a "theory" without sufficient evidence or logical reasoning. Ensure that your "theory" is not simply a guess or unsupported opinion, as this weakens your argument and undermines your credibility.

Linguistic Context

The noun "theory" functions as a core element in expressing concepts, explanations, or frameworks. Ludwig shows its usage in various domains, from scientific explanations to speculative ideas.

Expression frequency: Very common

Frequent in

News & Media

78%

Science

10%

Formal & Business

5%

Less common in

Encyclopedias

2%

Wiki

2%

Academia

3%

Ludwig's WRAP-UP

The term "theory" is a versatile noun used to describe explanations, models, or frameworks for understanding phenomena. As confirmed by Ludwig AI, it is grammatically correct and frequently employed across diverse contexts, particularly in News & Media. Understanding the nuances of "theory" is crucial for effective communication. This guide provides insights into its usage, offering best practices and common errors to avoid. For example, be careful to provide enough evidence when discussing any "theory". This tool has also provided the relationship between "theory" and alternative phrases such as "hypothesis", and also FAQ questions to help users fully understand "theory".

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

Hypothesis

A proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Model

A simplified description, especially a mathematical one, of a system or phenomenon, used to explain or predict its behavior.

Framework

A basic structure underlying a system or concept.

Principle

A fundamental truth or proposition that serves as the foundation for a system of belief or behavior.

Concept

An abstract idea or general notion.

Premise

A previous statement or proposition from which another is inferred or follows as a conclusion.

Assumption

A thing that is accepted as true or as certain to happen, without proof.

Contention

A heated disagreement.

Postulate

A thing claimed or assumed as true as the basis for reasoning or arguing.

Thesis

A statement or theory that is put forward as a premise to be maintained or proved.

FAQs

How can I use "theory" in a sentence?

You can use "theory" to describe a set of ideas explaining something, as in "The "theory of relativity" explains gravity" or to express an idea that might be true, as in "That's just a "conspiracy theory"".

What are some synonyms for "theory"?

Depending on the context, you can use synonyms like "hypothesis", "model", "framework", or "principle" to replace "theory" in your writing.

Is it correct to say "in theory" or "theoretically"?

Both "in theory" and "theoretically" are correct. "In theory" means something is possible or true according to a "theory", while "theoretically" means according to "theory" rather than practice.

What is the difference between a "theory" and a law in science?

A scientific law describes what happens, often expressed mathematically, while a "theory" explains why something happens, backed by evidence and repeated testing. A "theory" is more comprehensive and explanatory than a law.