I think the question then becomes, if in Dnd there are acts that are X evil, where X is the quantity of evil required to be 100% irredemable. Do their opposites exist?

Does an act exist which is Y quanity of good where Y is the quanity of good required to be 100% irrevocably good now?

If so, What happens if a character does both things?

WHAT HAPPENS WHEN AN UNSTOPPABLE FORCE HITS AN IMMOVABLE OBJECT DANGIT!