A platform where people get to convey what they didn't think of during a live conversation. After formulating their thoughts they send a google-docs-like link to the other party. Both can then discuss individual sentences and branch the conversation into different directions until each branch is considered closed.
After your conversation with someone has ended, you later come up with things you should have said. A quality thought requires time and peace of mind. Unfortunately, this often comes "too late".
This is a way to continue the conversation that seemingly ended.
It's difficult to formulate your thoughts on the spot, especially when you're bombarded with countless factors (emotions, stress, other person's arguments and point of view, etc) during an intense conversation.
A google-docs like platform, where you compose a document of your thoughts and send a link to the recipient. They can then highlight any individual sentences or paragraphs and reply to them. This way both of you can continue discussing each specific aspect in a forum-like thread.
The entire conversation can be seen in a zoomed-out, mind-map mode where branches of different directions/arguments are visible. The conversation takes the shape of a tree.
When both parties agree that there is nothing more to add to a specific branch, that branch changes color and is considered closed. It can be re-opened at any time if new thoughts come to mind.
When all branches are closed by both parties, the conversation has ended.
This idea was inspired by Goran Radanovic's comment.