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Single Idea 13437

[filed under theme 9. Objects / B. Unity of Objects / 3. Unity Problems / b. Cat and its tail ]

Full Idea

At t1 there is a whole CAR, and a PART of it, which is everything except the right front wheel. At t2 the wheel is removed, leaving just PART, so that CAR is now PART. But PART was a proper part of CAR, and CAR had the front wheel. Different properties!

Gist of Idea

A CAR and its major PART can become identical, yet seem to have different properties

Source

André Gallois (Occasions of Identity [1998], 1.II)

Book Ref

Gallois,André: 'Occasions of Identity' [' 1998], p.15

A Reaction

[compressed summary] The problem is generated by appealing to Leibniz's Law. My immediate reaction is that this is the sort of trouble you get into if you include such temporal truths about things as 'properties'.

The 4 ideas from 'Occasions of Identity'

16233 Gallois hoped to clarify identity through time, but seems to make talk of it impossible [Hawley on Gallois]
14755 Gallois is committed to identity with respect to times, and denial of simple identity [Gallois, by Sider]
16231 Occasional Identity: two objects can be identical at one time, and different at others [Gallois, by Hawley]
13437 A CAR and its major PART can become identical, yet seem to have different properties [Gallois]