In its most extreme version 'the Sapir-Whorf hypothesis' can be described as relating two associated principles: linguistic determinism and linguistic relativism. Applying these two principles, the Whorfian thesis is that people who speak different languages perceive and think about the world quite differently, their worldviews being shaped or determined by the language of the culture (a notion rejected by social determinists). Critics note that we cannot make inferences about differences in worldview solely on the basis of differences in linguistic structure.