This is a question arising from thinking about Aristotelean philosophy.
An object is defined by three characteristics: 1) its substance, 2) its essence, and 3) its accidents. Its substance corresponds to the object itself. Its essence is the universal that defines what kind of object it is. If it is an apple, its essence is “appleness”. If it is a bullet, its essence is its “bulletness”. Finally, properties of the object that are not its essence are its accidents. So, for an apple its accidents would be its color, its weight, its sweetness, etc.
The question I have is about how essences are defined; specifically, how they relate to accidents. The following thought experiment clarifies this.
Consider a table on which there is a collection of apples. There are Granny Smith apples, which are green and moderately sized. There are Golden Delicious apples, which are yellow and also moderately sized. There are Crab Apples, which are red and small. Finally, there are Hokutu apples, which are also red, but very large.
As I understand Aristotelean ontology, all of the objects on the table have the same essence, “appleness”. The other properties of those objects are its accidents, e.g., their color, their mass, their sweetness.
However, it cannot be that the accidents of one object are never the essence of another object. Consider a laser beam shinning through a mist of fog. The essence of the laser beam is its color. Or consider objects known as bullets. Their essence is not the material from which they are made, their shape or their size.
Bullets are launched from a weapon and are intended to strike an object and damage it. Photons are not bullets, since they have zero rest mass and (as a single object) cannot damage a macroscopic object they strike. Soap bubbles and smoke rings are not bullets, since they also cannot damage the objects they strike. So, it would seem that “bulletness” occurs when an object has sufficient mass so when they are launched at sufficient speed, they can damage the object they strike.
Since accidental properties of one object (e.g., mass, color) can define the essence of another object, the definition of what constitutes essence must be subjective. We choose which property to emphasize according to how those objects are used. Apples have “appleness” because we normally think of them as a particular fruit we eat. However, if an apple is launched using a slingshot, its use is that of a bullet. The important property in this situation is not how it is used as food, but how it is acts as a flying projectile, i.e., its essence is related to its mass.
As I understand Aristotelean ontology, an object can have only one property that constitutes its essence. The idea that apples considered as fruit have the “appleness” essence and apples considered as bullets have a different essence related to its mass is contrary to the Aristotelean formmulation.
Has anyone thought about this problem and come up with an adequate solution? Or is their some line of reasoning that shows this is not a real problem, but rather a misunderstanding of the notions of essence and accident?
