Communication
For a message exchange to be successful, the sender and the recipient must have agreed on a vocabulary that avoids ambiguity. For example, the word hedge can mean completely different things based on the context. In botany a hedge is a row of shrubs or trees that make a barrier or form a border. In finance, a hedge is an investment made to reduce the risk of another investment. In linguistics a hedge is a word or set of words that make other words less important. Without information it is therefore very difficult to know which hedge is really meant by the speaker.