The article by István Forgács discusses the evolution and significance of software testing, particularly focusing on what he terms the "Golden Age of Software Testing" from 1975 to 1980. During this period, pivotal advancements were made, including the establishment of theoretical foundations for test data selection and the differentiation between testing and debugging. Notable contributions by researchers such as John B. Goodenough and Susan L. Gerhart introduced important concepts like test selection criteria and the reliability of these criteria, while Bill Howden's work emphasized the inherent limitations in achieving exhaustive testing. Forgács also highlights the Competent Programmer Hypothesis, which suggests that developers typically create programs that are close to correct, simplifying test design, and the Coupling Effect Hypothesis, which posits that detecting simple faults in a program often leads to the discovery of more complex faults. These foundational theories have shaped modern software testing practices, and despite the challenges in detecting every possible bug, they underscore the importance of rigorous testing methodologies to improve software reliability and quality.