In this episode of 'Stuff You Should Know', hosts Josh and Chuck explore solipsism, the philosophical belief that only one's own mind is certain to exist. They examine its implications, questioning reality and existence while connecting it to historical skepticism. The discussion includes the challenges of understanding other minds and subjective experiences, the ethical dimensions of solipsism, and responses to critiques, such as Samuel Johnson's famous rebuttal. Ultimately, the conversation raises profound questions about the nature of reality and our perception of consciousness.