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[[Image:lighterstill.jpg]][[Image:Bridgetoterabithia_2.jpg|right|frame]]

[[Image:lighterstill.jpg]][[Image:Bridgetoterabithia_2.jpg|right|frame]]

A vast array of accounts attempt to explain the [[nature]] of concepts. According to classical accounts, a concept denotes all of the entities, [[phenomena]], and/or relations in a given category or class by using definitions.  Concepts are abstract in that they omit the [[difference]]s of the things in their extension, treating the members of the extension as if they were identical. Classical concepts are universal in that they apply equally to every thing in their extension.  Concepts are also the basic elements of propositions, much the same way a [[word]] is the basic [[semantics|semantic]] element of a [[sentence]]. Unlike [[perception]]s, which are particular images of individual objects, concepts cannot be visualized. Because they are not themselves individual perceptions, concepts are discursive and result from [[reason]].

A vast array of accounts attempt to explain the [[nature]] of concepts. According to classical accounts, a concept denotes all of the entities, [[phenomena]], and/or relations in a given category or class by using definitions.  Concepts are abstract in that they omit the [[difference]]s of the things in their extension, treating the members of the extension as if they were identical. Classical concepts are universal in that they apply equally to every thing in their extension.  Concepts are also the basic elements of propositions, much the same way a [[word]] is the basic [[semantics|semantic]] element of a [[sentence]]. Unlike [[perception]]s, which are particular images of individual objects, concepts cannot be visualized. Because they are not themselves individual perceptions, concepts are discursive and result from [[reason]].