Tractatus

Tractatus logico-philosophicus

Ludwig Wittgenstein (1921)

The Tractatus logico-philosophicus is the first major work of the Austrian philosopher Ludwig Wittgenstein. The work addresses fundamental questions of logic, language, and philosophy.

The Seven Main Propositions

  1. 1

    The world is everything that is the case.
  2. 2

    What is the case, the fact, is the existence of atomic facts.
  3. 3

    The logical picture of the facts is the thought.
  4. 4

    The thought is the significant proposition.
  5. 5

    Propositions are truth-functions of elementary propositions.
  6. 6

    The general form of truth-function is: [p, ξ, N(ξ)].
  7. 7

    Whereof one cannot speak, thereof one must be silent.