This post part of an attempt to draft in public. See my reasoning here. This is a personal post so if you see it, it should be because you chose to. I invite you to become a joint editor or suggest comments/text blocks below. 

Discussion:

• Many issues involve discussions about numbers
• People disagree on those number
• There should be a way for someone to put an estimate in and for someone else to comment on how theirs is different and suggest different numbers