As only one answer can be right what do you do if someone has almost got it right, but is missing something? Or, even worse what do you if someone answers after you and although they're wrong have included a detail that you missed?
I'd like to be able to cite their answer and then share the points. I often feel like the other people answering the same question as me are in competition with me. This seems like a shame. It'd be nicer if we felt like we were working together towards an answer that would help someone.
This feature is probably more trouble than it's worth and I worry that it might confuse users. But, what do people think?