I wrote extremely briefly recently about Group Think & Group Polarization to make the point that two of the biggest challenges facing group conversation are how to overcome Group Think and Group Polarization.
I was delighted a few days later when Paul Sloane picked up on this and wrote a short article
How to Fight the Scourge of Groupthink.
When I get a little bit more time I will write about how to how to ensure that when you design a Knowledge Cafe - you can avoid or at least reduce Group Think and Group Polarization as although the Cafe process naturally tends to avoid these issues, in some circumstances extra care needs to be taken.
Dave Snowden's ritual dissent method has a role to play here.