The reflexive documentary mode focuses on the relationship between the filmmaker and the audience. While expository documentaries set up a specific point of view or argument about a subject and a narrator often speaks directly to the viewer.
The answer is Hypothesis. It is something more than just a wild guess but less than a well-established theory, a theory which can be tested through study and experimentation.. They are assumptions generally believed to be true. They are provisionally accepted in order to interpret certain events or phenomena, and to provide guides for further study.
