I know it isn't your preferred method of working, but I'll start by suggesting a draft question about determining relationships.
"I've had my DNA tested and some matches have shown up. The site I'm using suggests a relationship (or a small set of possible relationships) between me and one of those matches. How accurate is that going to be? Can it ever be wrong?"
I think it's going to be very difficult to cooperatively edit a file when it is in dropbox. And I'm really not a fan of the chat format at Stack Exchange for discussing this. Could a meta question be created instead?
@lkessler I was hoping we'd get the bones of a rough draft before we moved to co-operative editing -- this all started in a discussion in Root... But I'm not wedded to any particular approach.
Certainly hadn't thought about sandboxing a 'real' question in Meta before.