This pseudo-Paper is intended as the mechanism to record time spent on the Note 'Exdurantism' during my Thesis research, as from 2011. Click here for Note.
Write-up1 (as at 15/10/2017 12:11:31): Exdurantism
- What follows is a modified version of a write-up3 of the relevant section of "Kurtz (Roxanne) - Introduction to Persistence: What’s the Problem?".
- Exdurantism is otherwise known as Stage Theory and Kurtz describes it as analogous to identity4 between possible worlds. Just as an object might have had incompatible properties – and this is cashed out as a counterpart in a possible world having these properties – so a temporal counterpart stage of the object has them. The objects with incompatible properties are, in both cases, non-identical counterparts of one another. So, the exdurantist then contends that change over time is nothing more than an object and its temporal counterpart having incompatible properties and existing at different moments in the actual world.
- Exdurantists have it that an object is numerically identical to a single stage, and is wholly present at the moment it exists. In contrast to Perdurance5, according to Exdurantists, objects persist when they exdure, and exdure by changing over time. An object changes over time, then, when it and a counterpart stage just have6 incompatible properties. Consequently, an exduring object does not – strictly speaking – survive change.
- The primary proponent of Exdurance is Ted Sider.
- Acording to Exdurance, an object undergoes change when it and a counterpart “just have” incompatible properties. It persists when it changes over time by standing in the counterpart relation7 to a stage from a different time. As no single thing has incompatible properties (different stages are different objects), Exdurantism satisfies the demands of consistency.
- Exdurantism has the advantage over Perdurantism in that it’s the object itself that “just has” its properties, rather than a (temporal) part of the object. However, just like Perdurantism, Exdurantism rules out change as is commonly understood. In both cases, it’s just different stages that have the incompatible property, not one and the same whole object.
- But, Exdurantism does much worse over survival, in that an exduring object doesn’t survive, as the different stages are different objects. At best, an exduring object “continues” in some way, but the momentary stages are no more identical than are links in a chain.
- A reading list (where not covered elsewhere) might start with:-
- "Hawley (Katherine) - Parts and Stages", Hawley
- "Hawley (Katherine) - Sticking Stages Together", Hawley
- "Sider (Ted) - All the World's a Stage", Sider
- "Sider (Ted) - Persistence and Parthood Seminar", Sider8
- "Sider (Ted) - Temporal Parts", Sider
- "Sider (Ted) - The Stage View and Temporary Intrinsics", Sider
- "Simons (Peter) - How To Exist at a Time When You Have No Temporal Parts", Simons
- "Varzi (Achille) - Naming The Stages", Varzi.
- This is mostly a place-holder9.
- This is the write-up as it was when this Abstract was last output, with text as at the timestamp indicated (15/10/2017 12:11:31).
- Link to Latest Write-Up Note.
- A number of my philosophical Notes are “promissory notes” currently only listing the books and papers (if any) I possess on the topic concerned.
- I’ve decided to add some text – whether by way of motivation, or something more substantive – for all these identified topics related to my Thesis.
- As I want to do this fairly quickly, the text may be confused or show surprising ignorance.
- The reader (if such exists) will have to bear with me, and display the principle of charity while this footnote exists.
- “Identity” is, strictly speaking, the wrong term, if the counterparts are non-identical.
- Just Having (a property) is a term of art.
- To quote Kurtz: an object just has a property if and only if no extrinsic facts are relevant to the truth of the proposition that the object has that property.
- Just Having a property is a slightly tricky concept, and "Lewis (David) - Rearrangement of Particles: Reply to Lowe" is invoked, which refers to non-relational changes (the example is of changing your shape by sitting, etc.).
- Just how is this “Counterpart Relation” cashed out?
- This is itself a reading list, not all of which is strictly relevant to exdurantism.
Text Colour Conventions (see disclaimer)
- Blue: Text by me; © Theo Todman, 2018
- Mauve: Text by correspondent(s) or other author(s); © the author(s)