groupthink is a systemic bias problem in decision making. It can be viewed as a tensegrity incompatible with the surrounding environment that propagates itself - a strictly human error that is imposed on everyone and everything not there in the room decisions are made. It lets those of like mind pretend to represent everyone else.

Some portray it as a psychological cancer that reduces psychodiversity and interferes directly with consensus decision making by imposing unanimity and suppressing dissensus.

Various solutions including right of appeal, democratic structuring, mandatory outreach, GROOP and Bonser method have been implemented to ensure that there are at least multiple opportunities to review a decision, even by the same group.

refer link to GFDL corpus en: wikipedia: groupthink for neutral point of view unrelated to Canadian politics as usual.