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# Ontology

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Ontology, the most fundamental branch of metaphysics, is the study of being or existence as well as the basic categories thereof. A being is anything that can be said to 'be' in various senses of the word 'be.' 'Be' is a word, like many other words, that has different senses. So there are different senses of the word "be," and accordingly, one might say, there are different "kinds" of beings, or ways of being. In Aristotle's phrase, ontology is "the science of being qua being." The word 'qua' means 'with regard to the aspect of'. So ontology is the science of being with regard to the aspect of being--so it is the study of beings insofar as they exist. More precisely, ontology concerns determines what categories of being are fundamental or irreducible and asks whether, and in what sense, the items in those categories can be said to "be."

Different philosophers make different lists of the fundamental [categories of being]?; and one of the basic questions of ontology is: "Just what are the fundamental categories of being?"

So here are some examples of ontological questions?:

1. What sort of concept is existence?
2. Is it possible to give an account of what it means to say that a physical object exists?
3. What are [physical objects]? anyway?
4. What are an object's properties? or relations and how are they related to the object itself?
5. When does an object go out of existence, as opposed to merely changing??

There are, of course, many more.

Ontological problems and topics

Ontological concepts

The ontological problems par excellence include:

- What is Existence?
- Is Existence is a property?
- The Problem of universals
- The Problem of substance: Are Objects? ultimately bundles of properties or instead Substances?

There are, however, very many more ontological problems than these.

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Last edited May 28, 2001 9:06 am (diff)
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