what are the m’naghten rules
D must shoe that at the time of the offence, he was suffering from:
1. Defect of reason
2. Disease of the mind
3. Did not know the nature or quality of his act
4. Did not know what he was doing was wrong
what is a special verdict
not guilty by reason of insanity
whats defect of reasoning
D is deprived of the power of reasoning when committing the crime.
whats disease of the mind
legal rather than medical defintion, meaning a malfunctioning of the mind.
this includes internal factors
what does the case of hennessy say
diabetes caused insanity
hyperglycaemia state
what does not knowing nature and quality of conduct mean
d either had no idea what he was doing at all or d had some idea about what he was doing but was mistaken
r v keal?
d must not know his act is both legally qrong and morally wrong