Categorical Essences
May 3rd, 2006 Fred McVittie
The concept of the essence, whilst rightly dismissed from empirical science, is nevertheless a staple of several other systems of thought including folk or naive sciences, theology, and metaphysics.
The concept of the essence is closely related to that of the category. An essence can be seen as the metaphorical physicalisation of the ‘necessary and sufficient conditions’ which must be met for inclusion of any entity within a specific category. It could be argued that such conditions are routinely met without recourse to essentialism, as for example where the conditions for inclusion in the category of ‘birds’ is the possession of functioning wings. This argument for classical categories has been dismissed however by writers from Wittgenstein to Rosch in favour of a view of categorisation based on the prototype or on ‘family resemblance’ rather than necessary conditions. Despite this critique, the organisation of experience according to the necessary and sufficient conditions required by classical categorisation still obtains, to the extent that it may be an innate human tendency.
A product of this innate tendency to assume that such conditions exist is the formulation of an imaginary set of such conditions which, whilst they may have no literal existence, nevertheless are assumed to exist in some transcendent form. So it becomes possible to identify a bird, with or without functioning wings, as nevertheless belonging to the category birds, because of an essential birdness which is possesses, and which are its defining feature qua bird. This transcendent feature is the categorical essence of the bird, and is shared by all members of the category of birds.
This paper will consider the ontological status of these categorical essences, suggesting that such essences are best read as metaphorical or metanymic.
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