When assign people to subgroups, it???s important to isolate ???idea crushers??? in their own subgroup. These people are otherwise suitable for the workshop but, intentionally or not; prevent others from suggesting good ideas. They come in three varieties: bosses, ???big mouths,??? and subject matter experts. The boss???s presence, which often makes people hesitant to express unproven ideas, is particularly damaging if participants span multiple organizational levels. Big mouths take up air time, intimidate the less confident, and give everyone else an excuse to be lazy. Subject matter experts can squelch new ideas because everyone defers to their presumed superior wisdom, even if they are biased or have incomplete knowledge of the issue at hand.