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Tractatus Logico-Philosophicus · Chapter

2.18 explained

Wittgenstein asserts that every picture, regardless of its form, must share logical form with reality in order to represent it, defining logical form as the form of reality itself.

What happens

Wittgenstein asserts that every picture, regardless of its form, must share logical form with reality in order to represent it, defining logical form as the form of reality itself.

Free preview opens on this chapter — companions, themes, and character notes appear beside the text.

Narrative arc

Story tension across the book.

SetupAftermathClimax
  • Setup
  • Escalation
  • Breaking point
  • Aftermath
  • Closing

This passage marks the story’s dramatic climax because it presents the moment when the protagonist’s obsessive…

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Themes in this chapter

  • Picture Theory of Language

    This proposition directly states the core of the picture theory: representation requires shared logical form.

  • Logic and Tautology

    Logical form is presented as the invariant condition for any picture to represent reality.

Characters to notice

  • Mr. Wittgenstein

    Author of the proposition, articulating the necessity of logical form for representation.

Key passages

  • “What every picture, of whatever form, must have in common with reality in order to be able to represent it at all⁠—rightly or falsely⁠—is the logical form, that is, the form of reality.”

    For any picture to depict reality, whether accurately or not, it must share the same logical structure as reality itself.

    Emphasizes the necessity of logical isomorphism for representation.