The main role of background knowledge is that it provides for the listener judgment, reasoning, speculation, etc. basis. It can affect the accuracy of prediction and inference.
The main function of background knowledge lies in the fact that it is the listener provides the judgment, inference, guessing basis. It can affect the accuracy of prediction and inference.
Background's primary role is to provide listeners with a judgement, reasoning, guessing based. It can affect the accuracy of forecasting and inference.