But with mental illness, most mental disorders lack “prognostic predictability,” which makes determining when psychiatric suffering has become irremediable, essentially incurable, particularly challenging.

Source: https://nationalpost.com/news/canada/explainer-medical-aid-in-dying-vs-suicide

The criterion to be killed in a hospital was informed consent on the part of an adult who was deemed to have a “grievous and irremediable condition.”

Source: https://www.ncregister.com/cna/fighting-euthanasia-in-canada-amanda-achtman-is-a-millennial-on-a-mission