The Top Level of Tractatus Logico-Philosophicus

• 1. The world is all that is the case.

  • 1.1
  • 1.2

• 2. What is the case--a fact--is the existence of states of affairs.

  • 2.2
  • 2.2

• 3. A logical picture of facts is a thought.

  • 3.1
  • 3.2
  • 3.3
  • 3.4

• 4. A thought is a proposition with a sense.

  • 4.1
  • 4.2
  • 4.3
  • 4.4
  • 4.5

• 5. A proposition is a truth-function of elementary propositions.
  (An elementary proposition is a truth-function of itself.)

  • 5.1
  • 5.2
  • 5.3
  • 5.4
  • 5.5
  • 5.6

• 6. The general form of a truth-function is [p, , N(X )].
  This is the general form of a proposition.

  • 6.1
  • 6.2
  • 6.3
  • 6.4
  • 6.5

• 7. What we cannot speak about we must pass over in silence.