au contraire
In Canada, murder is classified as either first or second degree.
First degree murder is a murder which is (1) planned and deliberate, (2) contracted, (3) committed against an identified peace officer, (4) while committing or attempting to commit one of the following offences (hijacking an aircraft, sexual assault, sexual assault with a weapon, aggravated sexual assault, kidnapping and forcible confinement or hostage taking), (5) while committing criminal harassment, (6) committed during terrorist activity, (7) while using explosives in association with a criminal organization, or (8) while committing intimidation.
Second degree murder is all murder which is not first degree murder. It could be "spur of the moment".