 The idea of divine testimony is at the core of traditional conceptions of revelation in both Jewish-Christian and Islamic thought (for the latter, see Adeel 2019: 30–35). However, testimony and the justification of testimonial beliefs can be understood in different ways. Within contemporary philosophy of testimony, there are two basic schools. Reductionists hold that beliefs acquired through testimony must be justified by an (implicit or explicit) argument from evidence that establishes the trustworthiness of the witness. Anti-reductionists deny this and regard testimony as a basic, sui generis source of epistemic justification, like perception and memory. Hence, for anti-reductionists, testimonial beliefs are non-inferentially justified. This view has interesting implications for the issue of belief in divine revelation.