All chapters

Tractatus Logico-Philosophicus · Chapter

4.1221 explained

Wittgenstein defines an internal property of a fact as a 'feature' of that fact, drawing an analogy to facial features to illustrate how such properties are inherent and recognizable.

What happens

Wittgenstein defines an internal property of a fact as a 'feature' of that fact, drawing an analogy to facial features to illustrate how such properties are inherent and recognizable.

Themes in this chapter

  • Logical Atomism

    The discussion of internal properties of facts relates to the atomic structure of facts and their constituent features.

Characters to notice

  • Mr. Wittgenstein

    Author of the proposition, introducing the concept of internal properties as features.

Key passages

  • An internal property of a fact we also call a feature of this fact. (In the sense in which we speak of facial features.)

    An inherent characteristic of a fact can be described as one of its distinguishing traits, similar to how we talk about the features of a face.

    Clarifies the terminology of internal properties by comparing them to observable facial features.