I would subdivide the group into those who seem like they intend to communicate the desired point(s) (and simply fail for whatever reason) and those who activel

I would subdivide the group into those who seem like they intend to communicate the desired point(s) (and simply fail for whatever reason) and those who actively don't wish to, such as for pride, to cover their lack of knowledge, to favour alternate options, to slow down a project etc.