This paper explores the thorny mingling of law with qualitative social science methodologies through the lens of the 2010–11 Supreme Court of British Columbia Charter Reference on polygamy, which was conducted to determine whether the criminalization of polygamy was consistent with the Canadian Charter of Rights and Freedoms. The Reference reveals how the marginalization of qualitative research(ers) effectively controlled whose voices were to be heard and whose were to be silenced in the broader project of sovereign intervention into family formation. With specific focus on Professor Angela Campbell, who provided expert opinion testimony in the Reference, this paper reflects on two important questions: when social science is invoked in legal settings, whose knowledge is legitimized, and who benefits from this legitimization? Drawing upon the longstanding feminist project of deconstructing assumptions of value-neutrality in all science, this paper considers how qualitative, feminist research(ers) may be inherently at odds with law’s quest for (rational) “truth.”