linguistics

Read the materials and write short answers to the following questions. Avoid cut and paste; try to use your own words to explain .
1.    What is the difference between the descriptive and the prescriptive approach to the investigation of language?
2.    Explain what is meant by the priority of the synchronic over the diachronic point of view in linguistics.
3.    Who was Ferdinand de Saussure? Why is he important in the field of Linguistics? (Do a mini-research on the internet).
4.    Is Linguistics a science? Why?
You should read all the 4 texts. Thanks