Blog Lecture No. 69: Parricide, Homicide and Murder

Turns out, I cannot discuss homicide and murder without discussing parricide.
How does the law define these three crimes?
The Revised Penal Code states thus:
Art. 246. Parricide. — Any person who shall kill his father, mother, or child, whether legitimate or illegitimate, or any of his ascendants, or descendants, or his spouse, shall be guilty of parricide [...]