Full Idea
We must avoid a use of 'identity' that implies that any entity over time must be said to lack continuing identity simply because it has changed properties or has lost, added, or had substituted some parts.
Gist of Idea
The concept of 'identity' must allow for some changes in properties or parts
Source
C.B. Martin (The Mind in Nature [2008], 04.3)
Book Reference
Martin,C.B.: 'The Mind in Nature' [OUP 2008], p.38
A Reaction
This may the key area where the logical-mathematical type of philosophy comes into contact with the natural-metaphysical type. Imagine Martin's concept of 'identity' in mathematics. π changes to 3.1387... during the calculation!