# 4.43 explained — Tractatus Logico-Philosophicus

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

## What happens

Wittgenstein explains that agreement with truth-possibilities is expressed by coordinating the mark 'T' (true) in the schema, while its absence indicates disagreement.

## Themes in this chapter

### Logic and Tautology

The use of the 'T' mark to express agreement with truth-possibilities relates to the logical structure of propositions.

## Character check-ins

### Mr. Wittgenstein

Author of the proposition

## Key lines

> Agreement with the truth-possibilities can be expressed by coordinating with them in the schema the mark “T” (true). Absence of this mark means disagreement.

We can show that a proposition agrees with the possible truth values by placing a 'T' next to them in the truth table; if there is no 'T', it indicates disagreement.

_Clarifies the notation for truth-conditions in the Tractatus._

## Links

- HTML: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters/4-43
- Book: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se
- All chapters: https://www.betterreads.online/discover/tractatus_logico_philosophicus_se/chapters