Automatic argument weighing
Add an automatically calculated weight number that can be represented by either numbers or thinner/thicker lines in that each reason makes the parent argument stronger by 1 point and each objection makes it weaker by 1 point. The sum is then added to the level above and so on, up to the root. The functionality this brings is, when the root is a question, negative numbers will mean a negative answer and positive numbers will mean a positive one. It's a way to make argument maps into decision maps automatically.