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A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols). Definitions can be classified into two large categories:...

semantic theory of truth is a theory of truth in the philosophy of language which holds that truth is a property of sentences. The semantic conception of truth...

of thinking about potentially related events. Theoretical definitions contain built-in theories; they cannot be simply reduced to describing a set of...

A theory of art is intended to contrast with a definition of art. Traditionally, definitions are composed of necessary and sufficient conditions, and a...

Definitionism (also called the classical theory of concepts) is the school of thought in which it is believed that a proper explanation of a theory consists...

operational definitions of key terms are used to preserve the unambiguous empirical testability of hypothesis and theory. Operational definitions are also...

challenges of string theory is that the full theory does not have a satisfactory definition in all circumstances. Another issue is that the theory is thought...

create products that are of value in a culture." This definition is unique for several reasons that account for MI theory's broad appeal to educators...

is a standard way for proving consistency of its definition, or, more precisely for proving that its theory is consistent, if Euclidean geometry is consistent...

working definition of antisemitism, also called the International Holocaust Remembrance Alliance definition of antisemitism or IHRA definition, is a non-legally...

physics". As such, the definition of a classical theory depends on context. Classical physical concepts are often used when modern theories are unnecessarily...

The definition of religion is a controversial and complicated subject in religious studies with scholars failing to agree on any one definition. Oxford...

indication of the extent to which a certain binary operation fails to be commutative. There are different definitions used in group theory and ring theory. The...

sometimes known as Hume's principle. This definition works in type theory, and in set theories that grew out of type theory, such as New Foundations and related...

The Chalcedonian Definition (also called the Chalcedonian Creed or the Definition of Chalcedon) is the declaration of the dyophysitism of Christ's nature...

Others take a living systems theory viewpoint that does not necessarily depend on molecular chemistry. One systemic definition of life is that living things...

formal theories of ν-times iterated inductive definitions". IDν extends PA by ν iterated least fixed points of monotone operators. The formal theory IDω...

acid–base reaction models as theories that complement each other. For example, the current Lewis model has the broadest definition of what an acid and base are...

Set theory is the branch of mathematical logic that studies sets, which can be informally described as collections of objects. Although objects of any...

Probability theory or probability calculus is the branch of mathematics concerned with probability. Although there are several different probability interpretations...