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Somewhere I've read
As per this information, every object will have unique identification, so that all objects of a class will be different from each other.
but,
which one is true? objects have 2 characteristics or 3 characteristics?
suppose there are two erasers of the same brand, look, shape, size and color.
So, these two objects should be treated as 'equal objects' as there is nothing to uniquely identify them?
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Accordingly, an object a is specifically self-identical if and only if it instantiates the property of being identical to a fixed object. Notice that while there is only one general self-identity, there are as many specific self-identities as there are objects.
Real-world objects share two characteristics: They all have state and behavior. Dogs have state (name, color, breed, hungry) and behavior (barking, fetching, wagging tail).
Physical identity (PhI) represents the individual's image about his/her own body and the represantion of the body in relation to the environment (social and natural environment).
Psychologists use it to refer to a person's self-image—to one's beliefs about the sort of person one is and how one differs from others. In philosophy the term normally refers to philosophical questions about ourselves that arise by virtue of our being people, questions that may otherwise have little in common.
Real-world objects share two characteristics: They all have state and behavior. Dogs have state (name, color, breed, hungry) and behavior (barking, fetching, wagging tail). 2)... An object is an entity that has state, behavior, and identity. The structure and behavior of similar objects are defined in their common class. ...
The two characteristics that an object always has are state and behavior. Consider a person object. Its state might include hair color, sex, height, and weight, but also feelings of anger, frustration or love. Its behavior could include walking, sleeping, cooking, working, or anything else that a person might do.
Representing real-world entities in code is BS. The only time you represent real-world entities is when you do physics/electronics/chemistry modeling. For that people use packages like Wolfram SystemModeler, Modellica, etc. They have almost nothing to do with OOP at least not in the common sense of OOP.
the primary identity is the natural property of the body-mind to locate itself in space and time and doing so, drawing lines of separation in those two coordinates between itself and other identities.
However, the culmination of an object's states and behaviors is an implicit identity; thus,
Two objects can have the exact same intrinsic characteristics (eg. color, size, shape), but differ in their extrinsic characteristics (eg. location, owner).
In this way, two objects may be considered equivalent when compared by a selection of their properties, but would be considered distinct in terms of the culmination of all intrisic or extrinsic states and behaviors.
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