In this technical discussion, extrinsic or accidental does not simply mean short-lived, random or quickly disappearing. It means not a constituent of the essence.
An extrinsic feature may necessarily accompany its subject and still remain outside the definition of what it is. Conversely, an essential differentia does not become accidental merely because a particular activity is not being exercised.
This leads to the distinction between necessary and separable accidents.
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The Five Predicables: Differentia, Property, Common Accident, Essential and Accidental Attributes
In this technical discussion, extrinsic or accidental does not simply mean short-lived, random or quickly disappearing. It means not a constituent of the essence.
An extrinsic feature may necessarily accompany its subject and still remain outside the definition of what it is. Conversely, an essential differentia does not become accidental merely because a particular activity is not being exercised.
This leads to the distinction between necessary and separable accidents.