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7. Existence / C. Structure of Existence / 4. Ontological Dependence

[things that rely on other things for their existence]

17 ideas
A thing is prior to another if it implies its existence [Aristotle]
     Full Idea: That from which the implication of existence does not hold reciprocally is thought to be prior.
     From: Aristotle (Categories [c.331 BCE], 14a32)
     A reaction: shadows and objects
Of interdependent things, the prior one causes the other's existence [Aristotle]
     Full Idea: For of things which reciprocate as to implication of existence, that which is in some way the cause of the other's existence might reasonably by called prior by nature.
     From: Aristotle (Categories [c.331 BCE], 14b12)
     A reaction: Not so clear when you seek examples. The bus is prior to its redness, but you can't have a colourless bus, so being coloured is prior to being a bus. Aristotle's example is a man being prior to the truths about him.
What is prior is always potentially present in what is next in order [Aristotle]
     Full Idea: What is prior is always potentially present in what is next in order … - for example, the triangle in the quadrilateral, or the nutritive part of animate things in the perceptual part.
     From: Aristotle (De Anima [c.329 BCE], 414a28)
     A reaction: 'Prior' seems to be a value for Aristotle, which is never present in modern discussions of ontological relations and structure. Priority tracks back to first principles.
Prior things can exist without posterior things, but not vice versa [Aristotle]
     Full Idea: Prior things can have being without posterior things, without the posterior being able to have being without the prior, to adopt Plato's distinction.
     From: Aristotle (Metaphysics [c.324 BCE], 1019a04)
     A reaction: Fine quotes this, in expounding Aristotle's account of essence.
Many of us find Frege's claim that truths depend on one another an obscure idea [Heck on Frege]
     Full Idea: Frege sometimes speaks of 'the dependence of truths upon one another' (1884:§2), but I find such ideas obscure, and suspect I'm not the only one who does.
     From: comment on Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884], §02) by Richard G. Heck - Cardinality, Counting and Equinumerosity 1
     A reaction: He refers to Burge 'struggling mightily' with this aspect of Frege's thought. I intend to defend Frege. See his 1914 lectures. I thought this dependence was basic to the whole modern project of doing metaphysics through logic?
Parallelism is intuitive, so it is more fundamental than sameness of direction [Frege, by Heck]
     Full Idea: Frege says that parallelism is more fundamental than sameness of direction because all geometrical notions must originally be given in intuition.
     From: report of Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884], §64) by Richard G. Heck - Cardinality, Counting and Equinumerosity 3
     A reaction: If Frege thinks some truths are more fundamental, this gives an indication of his reasons. But intuition is not a very strong base.
Being primitive or prior always depends on a constructional system [Goodman]
     Full Idea: Nothing is primitive or derivationally prior to anything apart from a constructional system.
     From: Nelson Goodman (Ways of Worldmaking [1978], 1.4c)
     A reaction: Something may be primitive not just because we can't be bothered to analyse it any further, but because even God couldn't analyse it. Maybe.
Ontological dependence rests on essential connection, not necessary connection [Molnar]
     Full Idea: Ontological dependence is better understood in terms of an essential connection, rather than simply a necessary connection.
     From: George Molnar (Powers [1998], 1.4.4)
     A reaction: This seems to be an important piece in the essentialist jigsaw. Apart from essentialism, I can't think of any doctrine which offers any sort of explanation of the self-evident fact of certain ontological dependencies.
An object is dependent if its essence prevents it from existing without some other object [Fine,K]
     Full Idea: One object depends upon another (in one sense of the term) if its essence prevents it from existing without the other object.
     From: Kit Fine (Essence and Modality [1994], p. 2)
     A reaction: I take the interest of this to be that essences are usually thought to be intrinsic, but this seems to involve the object in necessary external relations.
A natural modal account of dependence says x depends on y if y must exist when x does [Fine,K]
     Full Idea: A natural account of dependence in terms of modality and existence is that one thing x will depend on another thing y just in case it is necessary that y exists if x exists (or in the symbolism of modal logic, □(Ex→Ey).
     From: Kit Fine (Ontological Dependence [1995], I)
     A reaction: He is going to criticise this view (which he traces back to Aristotle and Husserl). It immediately seems possible that there might be counterexamples. x might depend on y, but not necessarily depend on y. Necessities may not produce dependence.
Dependency is the real counterpart of one term defining another [Fine,K]
     Full Idea: The notion of one object depending upon another is the real counterpart to the nominal notion of one term being definable in terms of another.
     From: Kit Fine (Ontological Dependence [1995], II)
     A reaction: This begins to fill out the Aristotelian picture very nicely, since definitions are right at the centre of the nature of things (though a much more transitional part of the story than Fine seems to think).
An object depends on another if the second cannot be eliminated from the first's definition [Fine,K]
     Full Idea: The objects upon which a given object depends, according to the present account, are those which must figure in any of the logically equivalent definitions of the object. They will, in a sense, be ineliminable.
     From: Kit Fine (Ontological Dependence [1995], II)
     A reaction: This is Fine's main proposal for the dependency relationship, with a context of Aristotelian essences understood as definitions. Sounds pretty good to me.
There is 'weak' dependence in one definition, and 'strong' dependence in all the definitions [Fine,K]
     Full Idea: An object 'weakly' depends upon another if it is ineliminably involved in one of its definitions; and it 'strongly' depends upon the other if it is ineliminably involved in all of its definitions.
     From: Kit Fine (Ontological Dependence [1995], III)
     A reaction: It is important to remember that a definition can be very long, and not just what might go into a dictionary.
Independent objects can exist apart, and maybe even entirely alone [Simons]
     Full Idea: An object a is ontologically independent of b if a can exist without b, if there is a possible world in which in which a exists and b does not. In the strongest sense, an object is independent if it could be all there is.
     From: Peter Simons (Parts [1987], 8.4)
     A reaction: Simons calls the strongest version a 'startling' one which maybe not even God could achieve.
There may be a one-way direction of dependence among sets, and among natural numbers [Linnebo]
     Full Idea: We can give an exhaustive account of the identity of the empty set and its singleton without mentioning infinite sets, and it might be possible to defend the view that one natural number depends on its predecessor but not vice versa.
     From: Øystein Linnebo (Structuralism and the Notion of Dependence [2008], V)
     A reaction: Linnebo uses this as one argument against mathematical structuralism, where the small seems to depend on the large. The view of sets rests on the iterative conception, where each level is derived from a lower level. He dismisses structuralism of sets.
Non-causal dependence is at present only dimly understood [Liggins]
     Full Idea: Non-causal dependence is at present only dimly understood.
     From: David Liggins (Truth-makers and dependence [2012], 10.8)
     A reaction: Not very helpful, you may be thinking, but it is always helpful to know where we have got to in the enquiry.
There's essential, modal, explanatory, conceptual, metaphysical and constitutive dependence [Jenkins, by PG]
     Full Idea: Dependence comes in essential, modal, explanatory, conceptual, metaphysical and constitutive forms.
     From: report of Carrie Jenkins (Grounding Concepts [2008], 1.2) by PG - Db (ideas)
     A reaction: You'll have to look up Jenkins for the details.