Full Idea
Frege's proposal can be isolation as discreteness, i.e. absence of overlap, between the objects counted; and isolation as drawing of conceptual boundaries.
Gist of Idea
Frege's 'isolation' could be absence of overlap, or drawing conceptual boundaries
Source
report of Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884]) by Kathrin Koslicki - Isolation and Non-arbitrary Division 1
Book Reference
-: 'Synthese' [-], p.405
Related Ideas
Idea 17426 A concept creating a unit must isolate and unify what falls under it [Frege]
Idea 17433 We can still count squares, even if they overlap [Koslicki]