skeptic > define

noun

• Someone who habitually doubts accepted beliefs.
  • synonyms: sceptic, doubter

• (a.) Alternative of Skeptical.
• (n.) A doubter as to whether any fact or truth can be certainly known; a universal doubter; a Pyrrhonist; hence, in modern usage, occasionally, a person who questions whether any truth or fact can be established on philosophical grounds; sometimes, a critical inquirer, in opposition to a dogmatist.
• (n.) A person who doubts the existence and perfections of God or the truth of revelation; one who disbelieves the divine origin of the Christian religion.
• (n.) One who is yet undecided as to what is true; one who is looking or inquiring for what is true; an inquirer after facts or reasons.