A skeptic is someone who questions claims and refuses to believe something without good evidence. When a friend tells you they saw a UFO land in their backyard, a skeptic would ask questions: “What did it look like? Do you have a photo? Could it have been something else, like a drone or helicopter?” A skeptic doesn't automatically say “that's impossible,” but they want solid proof before accepting an extraordinary claim.

Being skeptical is different from being negative or cynical. A good skeptic keeps an open mind but demands convincing evidence. Scientists are professional skeptics: they test ideas carefully, repeat experiments, and won't accept a new theory just because it sounds interesting. When someone claims they've invented a perpetual motion machine or discovered a miracle cure, skeptics ask to see the data and the tests.

The word comes from ancient Greek philosophers called Skeptics who believed people should question everything and examine ideas carefully before accepting them as true. Today, healthy skepticism helps protect us from scams, misinformation, and bad decisions. If something sounds too good to be true, a skeptical attitude means pausing to investigate before believing it.