|Concept: term for an entity with certain properties. The properties of an object correspond to the features of the concept. These concept features are necessary in contrast to the properties of an individual object, which are always contingent.|
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|Mayr I 364/365
Concepts/Ghiselin: Concepts can only be defined, details can only be described.
Michael T. Ghiselin
Metaphysics and the Origin of Species New York 1997
Das ist Biologie Heidelberg 1998