"The second element of the offence is that the accused killed the deceased by a conscious, voluntary and deliberate act or acts. Those words have a special meaning in law.
'Conscious' simply means that he knew what he was doing and he was not acting like a sleepwalker or like someone who rolls over in bed when they are asleep.
'Voluntary' means that the act which killed the deceased was a willed act, that is one resulting from the control by the accused of his own actions.
An act done when a person is not conscious in the sense I have just referred to would not be a voluntary act, but situations may also arise where although the mind is conscious of what the body is doing it is not in control of it so that the body acts like a machine, or an automaton, and there may be a dissociation or a division, if you like, between the mind and the body. Obviously that is not a common condition but it may result from head injury or from serious illness.
'Deliberate' means it was not accidental, such as tripping over and falling down the stairs and killing someone by accident, or if, say, someone fell over the balcony up there by accident and you were unlucky enough to be underneath, that would be an accident.
So once again you can see that something might not be deliberate although the person was conscious at the time. In other words, they are not asleep, they are not in a state of automatism, but what happens may not be a deliberate act.
To go back to those words again: conscious means not like a sleepwalker; voluntary means not like an automaton; and deliberate means not done by accident.
In the present case the accused man says that he was not aware that he had grasped the knife at the time he struck out with his arms in a state of blind panic to fend off the deceased. If this was so the consequent stabbing would be accidental. The very act of stabbing would be an accident. You must be satisfied beyond reasonable doubt that it is not reasonably possible that the accused did not know he was stabbing with a knife. I have put two negatives in that so to put it the other way: You must be satisfied beyond reasonable doubt that the accused was acting deliberately when he stabbed with the knife at the time the deceased suffered the fatal wound.
If it is reasonably possible that the situation was that he did not know he was stabbing with a knife you could not be satisfied beyond reasonable doubt that the act of stabbing was itself a conscious, voluntary and deliberate act. If you are not satisfied that the accused's action was deliberate you cannot convict him of either murder or manslaughter.
I will repeat that: If you are not satisfied the accused's action was deliberate you cannot convict him of either murder or manslaughter."