CRIME — alleged wounding with intent to murder — joint application for special verdict under s 31 of the Mental Health and Cognitive Impairment Forensic Provisions Act 2020 (NSW) — construction issue of what is the 'defence' that the Court needs to be satisfied is established in s 31(c) — consideration of onus of proof — whether act proven — whether defendant is 'not criminally responsible' — consideration of whether defendant had 'mental health impairment' at time of offending