—[1]
| “ | A person who earnestly believes in something, despite overwhelming scientific evidence to the contrary. Usually used as a derogatory term to imply the lack of critical thinking and/or intelligence on part of the true believer. | ” |
True Believers can believe anything that's weird and unreasonable, Astrology, Christian Fundamentalism, also a range of medical and political woo can appeal to a type of true believer. True Believers are fanatical and passionate about what they believe. Mainstream Christians aren't called True Believers though mainstream Christianity is also weird. [2]