Philosophical Investigations — Ludwig Wittgenstein

The book opens with Augustine’s description of learning language: adults point to things, children associate sounds with objects, and words become names. Wittgenstein treats this as a powerful but misleading picture. It works for some nouns in some contexts, but it cannot explain orders, questions, jokes, numbers, colours, pain, games, or the many other things language does. The danger is not that naming never happens, but that one simple case becomes a model for all meaning.

Ostensive definition looks simple: point and say a word. But pointing at a pencil could mean pencil, wood, one, this colour, this shape, or writing tool, depending on what the learner is prepared to do with the sign. A gesture only teaches within a background practice. This undermines the thought that language rests on bare acts of attaching names to objects. > An ostensive definition can be variously interpreted in every case.

Wittgenstein’s alternative is to ask how a word is used. Meaning is not a mental image, private object, or essence hovering behind the word. To understand a word is to know how it functions in the relevant language-game: when to say it, how to respond to it, what counts as using it correctly, and what role it plays in life. > The meaning of a word is its use in the language.

A language-game is a simplified scene of speech and action: builders calling for slabs, children learning words, people giving orders, telling stories, praying, calculating, reporting, joking, thanking, cursing. The point is pluralism: language has many jobs, and different jobs have different criteria. Looking at language-games breaks the spell of the idea that every sentence must work by naming or describing.

If every application of a rule required an interpretation, then the interpretation itself would require another interpretation, and so on. A rule cannot force its own future applications by a private mental act. What stops the regress is not another hidden meaning but a practice in which some applications count as continuing correctly and others do not. > Any interpretation still hangs in the air along with what it interprets.

To follow a rule is not to consult an inner rail stretching ahead to every future case. It is to have been trained into a practice where agreement in action gives words like same, continue, add, and obey their role. This is why rule-following is public and habitual rather than a private flash of interpretation. > To obey a rule, to make a report, to give an order... are customs.