Belief Now, True Belief Later: The Epistemic Advantage of Self-Related Insights in Psychedelic-Assisted Therapy

A commentary argues that Chris Letheby's defense of psychedelic therapy insufficiently supports the claim that insights about the self are epistemically superior to those about the external world. The author contends that a key underexplored element is the capacity of self-related beliefs to become self-fulfilling prophecies. Recognizing the psychedelic experience and subsequent integration as opportunities not only to apprehend facts about the self but also to actively shape and redetermine those facts is crucial for understanding the epistemic differences between insights about the self and the external world.

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Abstract

Chris Letheby’s defence of psychedelic therapy hinges on the premise that psychedelic-facilitated insights about the self are in a better epistemic position than those about the external world. In this commentary, I argue that such a claim is not sufficiently defended. More precisely, I argue that one element is underexplored in Letheby’s otherwise compelling picture: namely, that unlike new beliefs about the external world, beliefs about oneself have the capacity to turn into self-fulfilling prophecies. Recognising the psychedelic experience and the subsequent integration process as opportunities not only to apprehend certain facts about the self but also to actively shape and redetermine those facts is key to understanding the epistemic differences between insights patients have about themselves and about the external world.