ABSTRACT
In this instalment, as in the last one, Wittgenstein concentrates on the idea that concepts are usable only if they have sharp boundaries. He draws attention to the fact that we cannot always state what we know, notes that proper names like ‘Moses’ are no more sharply definable than concept words like ‘game’, and explores the assumption that our use of language is at every point circumscribed by rules. Once again he emphasizes that it is neither remarkable nor problematic that the meanings of words are not determinate in the philosopher’s sense.
