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Single Idea 11225

[from 'Definitions' by Anil Gupta, in 2. Reason / D. Definition / 2. Aims of Definition ]

Full Idea

In a modal logic in which names are non-vacuous and rigid, not only must existence and uniqueness in a definition be shown to hold necessarily, it must be shown that the definiens is satisfied by the same object across possible worlds.

Gist of Idea

A definition needs to apply to the same object across possible worlds

Source

Anil Gupta (Definitions [2008], 2.4)

Book Reference

'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.12