Picture theory of language

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 (German Bild) with spatial pictures. The picture theory of language is considered a correspondence theory of truth.

Wittgenstein claims there is an unbridgeable gap between what can be expressed in language and what can only be expressed in non-verbal ways. Picture theory of language states that statements are meaningful if they can be defined or pictured in the real world.

Wittgenstein's later practice-based theory of meaning laid out in the First Part of Philosophical Investigations refuted and replaced his earlier picture-based theory. However, the second psychology-focused Part of Philosophical Investigations employs the concept as a metaphor for human psychology.

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