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Full Idea
We call a 'collection' of jewels a 'group' term. Several random musicians are unlikely to be an orchestra. If they come together regularly in a room to play, such conditions are constitutive of an orchestra.
Gist of Idea
A 'group' is a collection with a condition which constitutes their being united
Source
Peter Simons (Parts [1987], 4.4)
Book Ref
Simons,Peter: 'Parts: a Study in Ontology' [OUP 1987], p.146
A Reaction
Clearly this invites lots of borderline cases. Eleven footballers don't immediately make a team, as followers of the game know well.
12846 | A 'group' is a collection with a condition which constitutes their being united [Simons] |
12848 | The same members may form two groups [Simons] |
12861 | 'The wolves' are the matter of 'the pack'; the latter is a group, with different identity conditions [Simons] |