Theories of understanding and of language use cannot be detached from theories of truth and reference as many have recently attempted to say. Wittgenstein's early picture theory and his theory of reference {Bedeutung) is part and parcel of his view on understanding meaningful sentences {Sätze), and the use of expressions. His later theory of meaning as use of expressions is inseparable from his view on what kind of objects these expressions refer to. As logical analysis is a quest for definiteness of sense and is not reductionism, not all objects of the Tractatus are of one kind. Singular propositions have no privileged role in linking language to the world. Understanding propositions with proper names or with demonstratives imply understanding of general propositions. This does not entail a definite description view of the sense of proper names. It does suggest that demonstrative pronouns are often not used anaphorically and never purely ostensively.