# 5.55 explained — Tractatus Logico-Philosophicus

> Chapter companion for Tractatus Logico-Philosophicus by Ludwig Wittgenstein.

## What happens

Wittgenstein argues that the forms of elementary propositions must be answerable a priori, but because the number of names with distinct meanings is indeterminate, the specific composition of any elementary proposition cannot be given.

## Themes in this chapter

### Logical Atomism

The discussion of elementary propositions composed of names reflects the logical atomist view that language is built from simple, unanalyzable elements.

### Limits of Language and Thought

The inability to give the composition of elementary propositions highlights the limits of what can be expressed or known a priori.

## Character check-ins

### Mr. Wittgenstein

Author of the proposition; presents the a priori question about elementary propositions.

## Key lines

> We must now answer a priori the question as to all possible forms of the elementary propositions.

We need to determine in advance, without empirical investigation, what all possible structures of basic propositions are.

_Wittgenstein sets the task of deriving the logical forms of elementary propositions from pure reason._

> The elementary proposition consists of names. Since we cannot give the number of names with different meanings, we cannot give the composition of the elementary proposition.

A basic proposition is made up of names, but because the count of names that have distinct referents is unknowable, we cannot specify the exact makeup of any elementary proposition.

_This underscores a fundamental limitation in fully describing the logical structure of language._

## Links

- HTML: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters/5-55
- Book: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se
- All chapters: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters