dogma

noun2

1. •
   An authoritative principle, belief or statement of opinion, especially one considered to be absolutely true and indisputable, regardless of evidence or without evidence to support it.

   • If he has a dogma, i.e. a scientifico-philosophical theory, then he is not any sort of Skeptic, not even an urbane Skeptic. — 2015
2. •
   A doctrine (or set of doctrines) relating to matters such as morality and faith, set forth authoritatively by a religious organization or leader.

   • In the Catholic Church, new dogmas can only be declared by the pope after the extremely rare procedure ex cathedra to make them part of the official faith.