more from Alfred Tarski

### Single Idea 13341

#### [catalogued under 5. Theory of Logic / K. Features of Logics / 2. Consistency]

Full Idea

Using the definition of truth we are in a position to carry out the proof of consistency for deductive theories in which only (materially) true sentences are (formally) provable.

Gist of Idea

Using the definition of truth, we can prove theories consistent within sound logics

Source

Alfred Tarski (The Establishment of Scientific Semantics [1936], p.407)

Book Reference

Tarski,Alfred: 'Logic, Semantics, Meta-mathematics' [Hackett 1956], p.407

A Reaction

This is evidently what Tarski saw as the most important first fruit of his new semantic theory of truth.