5.5561 Empirical reality is limited by [to?] the totality of objects. The limit shows up again in the totality of elementary propositions.

Hierarchies are, and must be, independent of reality.

Objects in what sense? Tractarian objects, being the possibilities, limit all reality, surely. And in this sense are no limit at all. It is presumably these limits he has in mind, since the same limit appears in the totality of elementary propositions, which depend on Tractarian objects. But what is the real connection between these and empirical reality?