# 4.4 explained — Tractatus Logico-Philosophicus

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

## What happens

Wittgenstein defines a proposition as the expression of agreement and disagreement with the truth-possibilities of elementary propositions, establishing the logical relationship between complex propositions and their atomic constituents.

## Themes in this chapter

### Logical Atomism

The proposition is analyzed in terms of agreement and disagreement with truth-possibilities of elementary propositions, reflecting the atomistic structure of language and reality.

### Logic and Tautology

The notion of truth-possibilities underpins the logical calculus of propositions, including tautologies and contradictions.

## Character check-ins

### Mr. Wittgenstein

Author of the Tractatus, presenting the logical structure of propositions.

## Key lines

> A proposition is the expression of agreement and disagreement with the truth-possibilities of the elementary propositions.

A proposition articulates which combinations of true or false elementary propositions it aligns with or opposes.

_This defines the proposition as a truth-function of elementary propositions._

## Links

- HTML: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters/4-4
- Book: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se
- All chapters: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters