Full Idea
The discrimination of things for counting needs to bring with it the notion of identity (and, correlatively, distinctness).
Gist of Idea
Discriminating things for counting implies concepts of identity and distinctness
Source
Michael Morris (Guidebook to Wittgenstein's Tractatus [2008], Intro.5)
Book Reference
Morris,Michael: 'Guidebook to Wittgenstein's Tractatus' [Routledge 2008], p.15
A Reaction
Morris is exploring how practices like counting might reveal necessary truths about the world.