Full Idea
Plantinga assumes that being identical with that snowball names a property which is that snowball's haecceity.
Gist of Idea
A snowball's haecceity is the property of being identical with itself
Source
report of Alvin Plantinga (De Essentia [1979]) by Jan Westerhoff - Ontological Categories §52
Book Reference
Westerhoff,Jan: 'Ontological Categories' [OUP 2005], p.130
A Reaction
Only a philosopher would suggest such a bizarre way of establishing the unique individuality of a given snowball. You could hardly keep track of the snowball with just that criterion. How do you decide whether something has Plantinga's property?