Wittgenstein's early Tractatus proposes that meaningful language works through a picture theory: propositions are pictures of possible states of affairs. Just as a picture represents by sharing logical structure with what it depicts, a sentence represents a state of affairs by having the same logical structure. Meaning arises from this structural isomorphism between language and reality.
Study simple propositions and elementary states of affairs to grasp the isomorphism. Then see how the theory breaks down for propositions about logic, ethics, and philosophy itself—which motivated Wittgenstein's later turn.
The picture must resemble the fact visually—Wittgenstein meant logical structure, not visual similarity. Every word is a name—Wittgenstein abandoned this view entirely in his later work.
From Frege you know that expressions have both sense (mode of presentation) and reference (the object or truth value they pick out). The *Tractatus* takes a different starting point. The young Wittgenstein was captivated by a question that Frege's framework doesn't directly answer: *how* does a proposition manage to represent a possible state of affairs? A name can be explained as standing in a relation to its bearer. But a sentence does something different and stranger — it depicts how things *might be*, even when they *aren't* that way. The picture theory is Wittgenstein's answer.
The key claim is that propositions and facts share logical form. A photograph represents a scene not because it resembles it in every detail, but because the spatial relationships among the elements in the photograph mirror the spatial relationships among the depicted objects. Wittgenstein generalizes this: a proposition represents a possible state of affairs because the elements of the proposition (names) are arranged in a way that mirrors the possible arrangement of the objects the names stand for. "aRb" (a stands in relation R to b) represents a possible fact because it has the same logical structure as the possible fact it depicts. The names in the proposition are the simplest elements, and they reach all the way down to simple objects — the indestructible atoms of the world. States of affairs are configurations of these simple objects; propositions are configurations of names that picture those configurations.
The theory draws a famous and dramatic consequence. Since a proposition must *show* its logical form rather than say it, and since logical propositions (tautologies, contradictions) say nothing about the world — they are either always true or always false regardless of how things are — logic cannot be *stated*, only exhibited in the structure of propositions. More dramatically: ethics, aesthetics, the existence of God, the meaning of life — none of these can be *said* in a meaningful proposition, because a meaningful proposition must picture a possible fact, and these domains don't consist of facts in the relevant sense. "Whereof one cannot speak, thereof one must be silent" — the *Tractatus* ends by placing everything that matters most outside the domain of what can be said.
The theory ultimately collapses under its own weight, and Wittgenstein knew it. Elementary propositions — the bedrock of the picture theory — were supposed to be logically independent of each other, but "this is red all over" and "this is green all over" cannot both be true simultaneously. This is a logical incompatibility among elementary propositions that the theory cannot account for. More broadly, the theory requires a precise correspondence between names and simple objects that language as actually used does not exhibit. The failure of the *Tractatus* drove Wittgenstein to his later philosophy, where language is not a picture of reality but a tool embedded in forms of life — a complete reversal of his early view.
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