Explore the complex relationship between science and society in this thought-provoking lecture by Stuart Firestein from Columbia University. Delve into the concept of optimism as a philosophical perspective and its connection to scientific progress. Examine the transformation of science from deterministic to uncertain, and how this shift paradoxically enhances optimism. Consider the challenges of communicating scientific uncertainty to the public and distinguishing genuine science from pseudoscience. Gain insights into the historical development of optimism, its role in modern scientific thinking, and its potential as a demarcation factor in science communication.