Why is Harry considered half-blood?

[potioncat]

No: HPFGUIDX 143192

 "scamjunk22" wrote:
>  but I have been wondering for a very long time as to why HP is said 
>to be half-blood!!! 


Potioncat:

Welcome!

To a certain extent, the answer is "just because."
One explanation is that Harry has 2 Muggle grandparents and two Magic 
Grandparents.

JKR apparantly decided to keep the distinctions to a minimum, rather 
than bogging down in differing degrees of Magic-ness. She does discuss 
it on her site, though.