This page discusses the need for controlled experiments to establish causation between factors A and B, highlighting the impracticalities in human studies that lead to the use of epidemiological metho...This page discusses the need for controlled experiments to establish causation between factors A and B, highlighting the impracticalities in human studies that lead to the use of epidemiological methods. It emphasizes the importance of validating new drugs and treatments through clinical studies to ensure they improve upon existing methods. Additionally, it outlines the scientific approach, which combines common sense with specific characteristics that define scientific inquiry.