idea_categories { 
	corruptionmod = {
		national_spirit = yes
		cost = 0
		removal_cost = -1
		
		ledger = hidden
	}
	modifferis = {
		national_spirit = yes
		cost = 0
		removal_cost = -1
		
		ledger = hidden
	}
	modifferistwo = {
		national_spirit = yes
		cost = 0
		removal_cost = -1
		
		ledger = hidden
	}
}