Full Idea
When asked whether a possible object is a counterpart of something, we need to specify which sortal we are interested in.
Gist of Idea
To decide whether something is a counterpart, we need to specify a relevant sortal concept
Source
Katherine Hawley (How Things Persist [2001], 6.2)
Book Reference
Hawley,Katherine: 'How Things Persist' [OUP 2004], p.180
A Reaction
The compares this to the 'respect' in which two things are similar. For example, what would count as a counterpart of the current British Prime Minister? De re or de dicto reference?