Indifferentism is the doctrine which holds that all religions, opinions and doctrines are alike and that one can be just as good or bad as another. Synonyms for indifferentism include religious skepticism, agnosticism, ecumenism, and religious pluralism. Religious skepticism refers to the view that all religious claims are doubtful and should be approached with skepticism. Agnosticism is the belief that it is impossible to know whether God exists or not. Ecumenism is the promotion of cooperation and unity among different religions. Religious pluralism is the acceptance of different religious beliefs and practices as equally valid and true. Each synonym for indifferentism represents a different viewpoint regarding religion and one's personal beliefs.