dogmatic

adj

1. Adhering only to principles which are true a priori, rather than truths based on evidence or deduction.

   “Dogmatic philosophies have sought for tests for truth which might dispense us from appealing to the future. Some direct mark, by noting which we can be protected immediately and absolutely, now and forever, against all mistake—such has been the darling dream of philosophic dogmatists.”

2. Pertaining to dogmas; doctrinal.
3. Asserting dogmas or beliefs in a superior or arrogant way; opinionated, dictatorial.

noun

1. One of an ancient sect of physicians who went by general principles; opposed to the empiric.