theory - définition. Qu'est-ce que theory
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Qu'est-ce (qui) est theory - définition

CONTEMPLATIVE AND RATIONAL TYPE OF ABSTRACT OR GENERALIZING THINKING, OR THE RESULTS OF SUCH THINKING
Theorist; Theories; List of theories; Theoretical approach; Theoretical; Merely a theory; Alternative Theories; Theory and fact; List of scientific theories and laws; Theoretic; Theoretical model; Theorized; Theory-based model; Theory of; A theory of; Theorists; Theoretical framework; Theorize

theory         
(theories)
Frequency: The word is one of the 1500 most common words in English.
1.
A theory is a formal idea or set of ideas that is intended to explain something.
Einstein formulated the Theory of Relativity in 1905.
N-VAR: usu with supp
2.
If you have a theory about something, you have your own opinion about it which you cannot prove but which you think is true.
There was a theory that he wanted to marry her...
N-COUNT
3.
The theory of a practical subject or skill is the set of rules and principles that form the basis of it.
He taught us music theory.
N-UNCOUNT: usu with supp, supp N, N of n
4.
You use in theory to say that although something is supposed to be true or to happen in the way stated, it may not in fact be true or happen in that way.
A school dental service exists in theory, but in practice, there are few dentists to work in them.
= theoretically
PHRASE: PHR with cl
theory         
n.
1.
Speculation, hypothesis, assumption, conjecture, postulate, plan, scheme, system.
2.
Science, philosophy, doctrine, abstract principles.
3.
Exposition, rationale.
4.
Philosophical explanation.
theory         
n.
1) to formulate a theory
2) to advance, advocate, present, propose, suggest a theory
3) to confirm; develop; test a theory
4) to disprove, explode, refute a theory
5) a pet; scientific theory
6) game; information; number; political; quantum; systems theory
7) the big bang; steady state theory
8) the germ theory (of disease)
9) a theory evolves; holds up
10) a theory that (she has a theory that drinking milk prevents colds)
11) in theory (in theory their plan makes sense)
12) on a theory (they proceeded on the theory that the supplies would arrive on time)
13) (misc.) the theory of relativity; to combine theory and practice

Wikipédia

Theory

A theory is a rational type of abstract thinking about a phenomenon, or the results of such thinking. The process of contemplative and rational thinking is often associated with such processes as observational study or research. Theories may be scientific, belong to a non-scientific discipline, or no discipline at all. Depending on the context, a theory's assertions might, for example, include generalized explanations of how nature works. The word has its roots in ancient Greek, but in modern use it has taken on several related meanings.

In modern science, the term "theory" refers to scientific theories, a well-confirmed type of explanation of nature, made in a way consistent with the scientific method, and fulfilling the criteria required by modern science. Such theories are described in such a way that scientific tests should be able to provide empirical support for it, or empirical contradiction ("falsify") of it. Scientific theories are the most reliable, rigorous, and comprehensive form of scientific knowledge, in contrast to more common uses of the word "theory" that imply that something is unproven or speculative (which in formal terms is better characterized by the word hypothesis). Scientific theories are distinguished from hypotheses, which are individual empirically testable conjectures, and from scientific laws, which are descriptive accounts of the way nature behaves under certain conditions.

Theories guide the enterprise of finding facts rather than of reaching goals, and are neutral concerning alternatives among values.: 131  A theory can be a body of knowledge, which may or may not be associated with particular explanatory models. To theorize is to develop this body of knowledge.: 46 

The word theory or "in theory" is sometimes used erroneously by people to explain something which they individually did not experience or test before. In those instances, semantically, it is being substituted for another concept, a hypothesis. Instead of using the word "hypothetically", it is replaced by a phrase: "in theory". In some instances the theory's credibility could be contested by calling it "just a theory" (implying that the idea has not even been tested). Hence, that word "theory" is very often contrasted to "practice" (from Greek praxis, πρᾶξις) a Greek term for doing, which is opposed to theory. A "classical example" of the distinction between "theoretical" and "practical" uses the discipline of medicine: medical theory involves trying to understand the causes and nature of health and sickness, while the practical side of medicine is trying to make people healthy. These two things are related but can be independent, because it is possible to research health and sickness without curing specific patients, and it is possible to cure a patient without knowing how the cure worked.

Exemples du corpus de texte pour theory
1. The theory of "principal enemy" means the theory of confrontation and theory of war.
2. "I can." That theory, thus far, is just a theory.
3. This is true in theory –– but this theory has been tried elsewhere with almost no success.
4. "Just because they call it a theory doesn‘t make it a scientific theory," Leshner said.
5. It turns an economic theory of cooperation into a high status, scientific theory of love.