Each concept also has a formal logic definition represented by a set of defining relationships to other concepts. This logic definition is computer processable. A primitive concept does not have sufficient defining relationships to computably distinguish them from more general concepts(supertypes).
See also sufficiently defined concept.
The concept 5596004 |atypical appendicitis (disorder)| is primitive because the following definition is not sufficient to distinguish "atypical appendicitis" from any other type of "appendicitis".
Table 1: Definition of 5596004|atypical appendicitis (disorder)| - (primitive)