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=                      Condition of possibility                      =
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                             Introduction
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Condition of possibility ('Bedingungen der Möglichkeit') is a
philosophical concept made popular by Immanuel Kant.

A condition of possibility is a necessary framework for the possible
appearance of a given list of entities. It is often used in contrast
to the unilateral causality concept, or even to the notion of
interaction. For example, consider a cube made by an artisan. All
cubes are three-dimensional. If an object is three-dimensional, then
it is an extended object. But extension is an impossibility without
space. Therefore, space is a condition of possibility because it is a
necessary condition for the existence of cubes to be possible. Note,
however, that space did not cause the cube, but that the artisan did,