characters_have_same_education_group_trigger

characters_have_same_education_group_trigger = {
	# First, we make sure that both characters have an education finalised.
	$CHARACTER_1$ = {
		OR = {
			has_trait = education_diplomacy
			has_trait = education_martial
			has_trait = education_stewardship
			has_trait = education_intrigue
			has_trait = education_learning
		}
	}
	$CHARACTER_2$ = {
		OR = {
			has_trait = education_diplomacy
			has_trait = education_martial
			has_trait = education_stewardship
			has_trait = education_intrigue
			has_trait = education_learning
		}
	}
	# Now check for the actual traits.
	$CHARACTER_1$ = {
		# Diplomacy.
		trigger_if = {
			limit = { has_trait = education_diplomacy }
			$CHARACTER_2$ = { has_trait = education_diplomacy}
		}
		# Martial.
		trigger_if = {
			limit = { has_trait = education_martial }
			$CHARACTER_2$ = { has_trait = education_martial }
		}
		# Stewardship.
		trigger_if = {
			limit = { has_trait = education_stewardship }
			$CHARACTER_2$ = { has_trait = education_stewardship }
		}
		# Intrigue.
		trigger_if = {
			limit = { has_trait = education_intrigue }
			$CHARACTER_2$ = { has_trait = education_intrigue }
		}
		# Learning.
		trigger_if = {
			limit = { has_trait = education_learning }
			$CHARACTER_2$ = { has_trait = education_learning }
		}
	}
}

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