Theorists such as Stuart Hall have problematised the idea that identity is something that remains essentially the same across time. Since doctrine has been cast as that which safeguards Christian identity, this provokes the question: what role can doctrine play if this is the case? Critiquing George Lindbeck's The Nature of Doctrine in light of Kathryn Tanner's work on rules suggests that doctrine cannot regulate, constitute or generate the necessary conditions for Christian identity. Doctrine can, however, still play a role in generating Christian meaning without regulating identity by determining how concepts are formed in Christian community.