Freethinker (noun)

1. A person who forms opinions about religion, politics, etc., independently of traditional or authoritarian sources.
2. A person who forms opinions about religion, politics, etc., independently of traditional or authoritarian sources, not adhering to any particular ideology or doctrine and instead relying on reason and evidence.

Origin:

Free + thinker.

Examples:

1. He was a freethinker who rejected traditional religious beliefs.
2. The freethinker challenged traditional political views.
3. The freethinker relied on reason and evidence.
4. He considered himself a freethinker.
5. The freethinker was not bound by any particular doctrine.