In AGR no.3 1994, the defendant wasn't liable for the murder because defendants actions wasn't the substantial cause of death and transferred malice can't be applied to transfer intent from the mother to the baby
Medical treatment doesn't usually break the chain of causation unless it's so independent from defendant's action and so significant that it makes defendants actions insignificant, shown in r v smith and r v Jordan
Doctors are allowed to switch of life support machines of people who are brain dead, shown in malcherok v steel, where the victims on life support machine weren't showing any activity in their brain
When defendant didn't intend a particular result but in acting the way they did they realised the act may occur, also known as foresight of consequence shown in hancock v shankland
Determines whether the defendant had intention to commit the crime, consisting of 2 questions: 1) was the consequence virtually certain 2) did defendant foresee that is was virtually certain? If yes then d can be found guilty of murder