Linguistics is defined as "the scientific study of human language." It is not an exact science, but it could be considered a form of scientific study in a way. Linguists look at language formation, language usage, and language meaning in an objective fashion. They form theories, hypothesis, and tests just as any other scientist would. Of course, studying language is much for fluid than studying concrete facts. Language is always changing and it can change rapidly. Linguistics also employs techniques and philosophies from other fields as well. Linguists use psychology, sociology, biology and many other fields to aid their study. The type of linguistics a person is researching might determine which branch of scientific study their study falls into.