Skeptics are individuals who question the validity of claims, beliefs, or information, often requiring evidence before accepting them as true. They apply critical thinking and scientific reasoning to evaluate assertions, especially those related to science, health, and supernatural phenomena. Skepticism can be seen in various fields, including philosophy and science, where it encourages inquiry and debate. Notable skeptics, such as Carl Sagan and James Randi, have promoted the importance of questioning extraordinary claims and seeking rational explanations. This approach helps to distinguish between fact and fiction, fostering a more informed society.