The document discusses the linguistic determinism theory proposed by Edward Sapir and Benjamin Lee Whorf, known as the Sapir-Whorf hypothesis. It states that the structure of a language affects its speakers' worldview or cognition. Specifically, it introduces the idea that language determines or influences thought, that language categories and structures condition the ways in which people think, and that speakers of different languages think and perceive reality in different ways. The document uses the example of Eskimo languages having different words for types of snow to illustrate how languages can categorize the world differently.