(Please read part one of my ontology first. Then look at the square at the bottom to understand where I'm leading to)
Now to the categories of what can exist. There are four:
(1) A
substance is that being which is self-explanatory. Substance exists independent of anything else, and its nature is contained in itself (all predicates are in the subject). What can be said about it belongs to it alone both clearly and distinctly, although other things may reflect its properties. Substance has the most reality of what exists in its clarity and distinctness.
Substance has four distinctions; infinite and finite, and pure and impure.
-An Infinite substance is that which all its modes are defining attributes, which it has a greater number than anything else. An infinite substance's essence entails its existence, for if anything can be known to exist at all it describes the infinite substance.
-A finite substance has a single essence defining attributes, and so only exists objectively if this particular attribute exists (ideationally).
-A pure substance has no parts other than itself as a whole. If broken down into smaller parts it loses its nature. If it can be divided further, it is not pure.
-An impure substance can be divided into smaller parts while retaining its nature.
Infinite substance has more objective reality than finite substance, and pure substance has more clarity than impure substance. An infinite pure substance is more real than a finite pure substance, while a finite pure substance has more reality than an infinite impure substance. There is not a pure, impure, infinite, or finite substance by themselves just as there is nothing which is true ideationally alone (C or p) or objectively alone (N or c).
(2) An attribute is what belongs to a single substance and not another. They are distinct thoughts that are clear in what they represent. These are all innate modes. Also can be called quality, essence or defining mode. There are three attributes; perfection, thought, and extension.
-Perfection. What is called perfect contains everything that can be said about it, and there is nothing else which is like it to be greater or lesser than. The concept of a square having four equal sides or a circle's points all being of equal distance from the origin.
-Thought. Thought is what occurs with everything we do even in the absence of any objects of sense. This includes willing, doubting, judging, affirming, denying etc. Deprived of all senses, if we still think there is something to think about, ourselves, which has an objective existence. Thus we can think of ourselves and only ourselves. The activities which occur in regard to only ourselves and accompany anything we do.
-Extension. What is extended takes up space, in more than one dimension, and can be divided into smaller parts. Whenever we imagine an object, we cannot conceive of it without being extended in space. We can imagine something without color or smell, but not without spatial extension. An extended thing can be divided further and further and be what it is, otherwise it is not extended.
(3) Modes are ideas which themselves exist in regard to something they represent. Modes are intentional thoughts, they are about something. Also called quantity. Some modes however refer to consciousness, thought itself, and are not intentional in the same way. Modes are the different ways a substance can exist in thought, all having reality because they are thought and represent something. There are two kinds of modes; innate modes and caused modes.
-Innate modes are those that are present to consciousness itself regardless of what is thought about, as if they inhere to mind substance. Yet they are not essential to mind substance, and so can belong to other things.
-Caused modes arise from without consciousness and so are not as clear, yet they are intentional and so belong to something objective.
(4) Accidents are ideas prior to any determination, present in thought yet not known to belong to anything outside of thought, even mind substance. Also referred to as affection or being affected. Accidents are neither clear nor distinct. Accidents are not essential to substances and their relation to the powers a substance has is unknown. There are two kinds of accidents; passions and the unconscious.
-A passion is present in thought, yet does not give us a clear idea of what the cause is nor whether it is essential to anything.
-The unconscious refers to a cause of ideas which is not a body or mind as we know them, and yet is not out of consideration. There is no clear notion of what the unconscious is, nor is it necessary to explain what we know. But it is not impossible.
There are three substances which are determined by three attributes (essences, or defining modes) and by whether they are pure, impure, infinite, or finite.
(1) Mind-pure,finite-thought
(2) Body-impure,finite-extension
(3) God-pure,infinite-perfection
There are two kinds of modes
(1) Innate Modes
(2) Caused Modes
And two kinds of accidents
(1) Passions
(2) The Unconscious
All together, we get:
Clarity | Distinctness |
Substance | Pure>Impure, Infinite>Finite |
Attribute ^ | Perfection>Thought>Spatial Extension |
Mode ^ | Innate>Caused |
Accident ^ | Passion>unconscious |
We have ten subcategories when we differentiate distinctiveness and clarity to the four general categories, in an ordinal rank.
1) Sfp= Mind Substance. Cc.
2) Sfi= Body Substance. Cc.
3) Sip= God Substance. NC.
4) Ap= Perfection Attribute. NC.
5) At= Thought Attribute. NC.
6) Ae= Extension Attribute. NC.
7) Mi= Innate Mode. Cc.
8) Mc= Caused Mode. Np.
9) Ap= Passions Accident. pc.
10) Au= Unconscious Accident. pc.
All substances are clear. My existence as mind is clear, though it is contingent. The existence of bodies is clear, both empirically and as a concept, yet it could be that there are no bodies, at least as conceived. I can still think and have a mind (exist) without a body as mind is its own substance. God is clear as being infinite, anything which exists describes this being, and God is necessary as nothing else is needed to explain what is said to be God, being perfect.
(The c below N is lowercase c; the C above p is uppercase).