# 4.127 explained — Tractatus Logico-Philosophicus

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

## What happens

Wittgenstein explains that a propositional variable signifies a formal concept, while its values represent the objects that fall under that concept.

## Themes in this chapter

### Logical Atomism

The propositional variable and its values relate to the logical structure of language and the objects that constitute atomic facts.

## Character check-ins

### Mr. Wittgenstein

Author of the proposition

## Key lines

> The propositional variable signifies the formal concept, and its values signify the objects which fall under this concept.

A variable in a proposition represents a formal concept, and the specific instances of that variable represent the objects that belong to that concept.

_Clarifies the relationship between formal concepts and their instances in logical notation._

## Links

- HTML: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters/4-127
- Book: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se
- All chapters: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters