more from M Fitting/R Mendelsohn

### Single Idea 13726

#### [catalogued under 10. Modality / E. Possible worlds / 3. Transworld Objects / c. Counterparts]

Full Idea

The main technical problem with counterpart theory is that the being-a-counterpart relation is, in general, neither symmetric nor transitive, so no natural logic of equality is forthcoming.

Gist of Idea

Counterpart relations are neither symmetric nor transitive, so there is no logic of equality for them

Source

M Fitting/R Mendelsohn (First-Order Modal Logic [1998], 4.5)

Book Reference

Fitting,M/Mendelsohn,R: 'First-Order Modal Logic' [Synthese 1998], p.93

A Reaction

That is, nothing is equal to a counterpart, either directly or indirectly.