The document discusses the differences between positive and normative science and economics. Positive science/economics deals with objective facts and descriptions of what is, and can be tested through empirical evidence. Normative science/economics involves value judgments about what should be and introduces subjective opinions and policy recommendations that cannot be empirically tested. While positive economics focuses on causal relationships and explanations, normative economics expresses judgments about economic fairness and desirable policy outcomes and societal goals.