 In remark #23 of "Philosophical Investigations" he points out that the practice of human language is more complex than the simplified views of language that have been held by those who seek to explain or simulate human language by means of a formal system.It would be a disastrous mistake, according to Wittgenstein, to see language as being in any way analogous to formal logic.Besides stressing the "Investigations"' opposition to the "Tractatus", there are critical approaches which have argued that there is much more continuity and similarity between the two works than supposed.