faith_is_syncretic_with

faith_is_syncretic_with = {
	$FAITH$ = {
		trigger_if = {
			limit = { has_doctrine_parameter = unreformed }
			prev = { has_doctrine_parameter = unreformed_syncretic_actor }
		}
		trigger_else_if = {
			limit = { religion_tag = christianity_religion }
			prev = { has_doctrine_parameter = christian_syncretic_actor }
		}
		trigger_else_if = {
			limit = { religion_tag = islam_religion }
			prev = { has_doctrine_parameter = islamic_syncretic_actor }
		}
		trigger_else_if = {
			limit = { religion_tag = judaism_religion }
			prev = { has_doctrine_parameter = jewish_syncretic_actor }
		}
		trigger_else_if = {
			limit = { is_in_family = rf_eastern }
			prev = { has_doctrine_parameter = eastern_syncretic_actor }
		}
		trigger_else_if = {
			limit = { is_in_family = rf_sinitic }
			prev = { has_doctrine_parameter = sinitic_syncretic_actor }
		}
		trigger_else = {
			always = no
		}
	}
}

As written in game/common/scripted_triggers/00_religious_triggers.txt.