Adequacy of the content and the interface

Hypertext design involves a mixture of decisions relating to the content, functionality, display, and control. The usefulness of hypertext depends on its purpose, ease of navigation, and the population domain. The authors have to determine tradeoffs among various design principles. For example, for a learning system the authors would have to not only look into the outcomes of using hypertext but also the quality of learning. In short, there is no upper limit on adequacy.