The document discusses four inadequate notions about the relationship between thought, language, and speech:
1) Speech production is fundamental to thought. This is rejected because thought precedes speech in children and some think without speaking.
2) Language is necessary for thought. This is rejected because deaf people and animals think without language.
3) One's language determines one's views of nature. This is rejected because the same language can have changing meanings and multilinguals have different views.
4) One's language determines one's culture. This is rejected because the same language can describe different cultures and different languages can share cultural views.
The document argues that language influences thought by providing new ideas, changing beliefs