Showing how to observe. The heuristic function of creating new research. Provide a framework for communicating and debating knowledge. Establishes norms of performance. Law Theories rely rimarily on causal necessity.
Law theories utilize laws which specify causal relations among variables.
Rules Attempts to describe the rules that compose human society. Focuses on correlations among events. Metatheory speculation on the nature of inquiry. Rhetoric as educational tool. Rhetoric as metaphor For more information see Stephen W. Littlejohn Theories of Human Communication .