Abstract

In Jylkkä’s (2022) Mary on Acid: Experiences of unity and the epistemic gap the author contends that psychedelic experience, by inducing unitary—nondual—experiences of subject-object dissolution, brings to light the epistemic gap between unitary knowledge, constituted by experience, and relational knowledge, distinct from the experience. Jylkkä draws a connection between the nondual experience as occasioned through psychedelic usage, and Buddhist contemplative practices. Whilst Jylkkä's ambition to establish an epistemic dialogue between analytic philosophy, Buddhism and the science of psychedelics is laudable, more rigorous attention is required to characterizing the forms of unitary, nondual, experience occasioned by psychedelic use. Whilst such parallelism may speak to a deeper unification, such a claim requires substantiation to avoid indulging a naïve perennialism which elides the varied and rich engagement with nonduality across contemplative traditions. This article highlights the: internal tensions that exist surrounding the nature of the nondual elucidated across Indo-Tibetan traditions; dangers of decontextualizing states induced through culturally embedded contemplative practices; under recognized epistemic function of ceremonial ethnomedicine usage in generating Indigenous metaphysics; under acknowledged potential of psychedelic substances for attenuating introspective bias in first-person phenomenological inquiry.