# 5.45 explained — Tractatus Logico-Philosophicus

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

## What happens

Wittgenstein argues that a correct logic must clarify the relationships and justification for the existence of its primitive signs, and that the construction of logic from these signs must be made clear.

## Themes in this chapter

### Logic and Tautology

The proposition discusses the necessity of making the construction of logic clear, relating to the nature of logical truths.

## Character check-ins

### Mr. Wittgenstein

Author of the proposition, articulating requirements for a correct logic.

## Key lines

> If there are logical primitive signs a correct logic must make clear their position relative to one another and justify their existence.

If logic has basic signs, a proper logical system must show how they relate to each other and why they are needed.

_Clarifies the foundational requirement for logical notation._

> The construction of logic out of its primitive signs must become clear.

How logic is built from its basic elements must be transparent.

_Emphasizes the need for clarity in logical structure._

## Links

- HTML: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters/5-45
- Book: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se
- All chapters: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters