Tractatus Logico-Philosophicus
The picture theory of language, also known as the picture theory of meaning, is a theory of linguistic reference and meaning articulated by Ludwig Wittgenstein in the "Tractatus Logico-Philosophicus". Wittgenstein suggested that a meaningful proposition pictured a state of affairs or atomic fact. Wittgenstein compared the concept of logical pictures () with spatial pictures. The picture theory of language is considered a correspondence theory of truth.