An Uncertainty Model of Suicidality

Sidney Carls-Diamante (LanCog, University of Lisbon)

20 December 2024, 16:00 (Lisbon Time – WET)

Faculdade de Letras de Lisboa

Sala Mattos Romão [C201.J] (Departamento de Filosofia)

Abstract: Uncertainty is a factor widely but implicitly acknowledged to contribute to suicidality, but is not often studied as a suicidogenic factor in its own right. This presentation details the role of uncertainty in generating suicidal thoughts and actions. It is proposed that suicidality is a set of cognitive and behavioural strategies for reducing uncertainty and its consequential disruptions to homeostasis, i.e., psychological and/or physiological stability. The presentation argues that there are three dimensions of uncertainty that specifically contribute to suicidality: uncertainty about 1) whether currently experienced adversity will continue into the future, 2) about whether present conditions will improve and 3) about when they will change. Persisting through life entails continued experience of such high-uncertainty states that may prove detrimental to homeostasis. In contrast, death is a high-certainty state, wherein distress, pain, or suffering – manifestations of disrupted homeostasis – are reliably predicted to end. Suicidal ideation thus emerges as a mental model that allows the agent to imagine death as a state wherein homeostasis is restored. When the agent’s distress becomes severe enough, escalation to suicidal action can occur as a behavioural strategy to precipitate restoration of homeostasis (in the form of an end to suffering) through death.