Skeptic (noun)

A person who questions the validity or authenticity of something, often by employing reason and evidence.

Origin:

The word 'skeptic' comes from the greek word 'skeptikos', which means 'inquiring' or 'doubting'. it was originally used to describe someone who was a member of a philosophical school in ancient greece that emphasized the importance of questioning and doubt.

Examples:

1. She was a skeptic about the existence of ghosts.
2. He was skeptical of the claims made by the new medicine.
3. Many people were skeptics of the moon landing being real.
4. The scientist was a skeptic of the theories presented by his colleagues.
5. The journalist was skeptical of the government's official story.