This document discusses knowledge representation on Wikipedia and the balance needed between community participation and diversity. It also examines the roles of experts versus general participants ("folks") and how expertise can be acknowledged. Different methods are presented for evaluating contributions and highlighting expertise in collaborative knowledge systems, with challenges around reliability and gaming the system. The document concludes by discussing Pierre Lévy's vision of collective intelligence through iterative finding, evaluating and sharing of information, and how the intelligence of such collective systems depends on protections against disruption and the skills/capacities of participants.