So what would count as murder that was not premeditated, as opposed to manslaughter then?
I thought premeditated required the person to have reasonably thought about what they were doing.
If it was a violent argument where he started waving a gun around, and shot in the heat of the moment without really thinking about what he was doing, would that really pass as being premeditated in a court of law?
The term premeditated causes much confusion, and leads people to think of planning. It is not actually in the definition of murder here, but is often used when discussing it.
Murder is unlawfully killing, with the intention of doing so, or causing grievous bodily harm.
The term intent often leads to the term premeditated.
Firing a gun at someone in temper is murder, even if the act is spontaneous.