A closed concept is a concept where all the
necessary and sufficient conditions
In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements. For example, in the conditional statement: "If then ", is necessary for , because the truth of ...
required to include something within the concept can be listed. For example, the concept of a
triangle
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices ''A'', ''B'', and ''C'' is denoted \triangle ABC.
In Euclidean geometry, any three points, when non- colline ...
is closed because it is a three-sided polygon, and only a three-sided polygon, is a triangle. All the conditions required to call something a triangle can be, and are, are listed.
Its opposite is an "open concept".
See also
*
Continuum fallacy
The sorites paradox (; sometimes known as the paradox of the heap) is a paradox that results from vague predicates. A typical formulation involves a heap of sand, from which grains are removed individually. With the assumption that removing a sing ...
References
External links
Open and Closed Concepts and the Continuum Fallacy- More on open and closed concepts
- A guide to the usage and application of necessary and sufficient conditions
Concepts in epistemology
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