Question about Pure Bloods and House of Slytherin

[Tonks]

> --- In HPFGU-OTChatter at yahoogroups.com, kemper mentor 
> <kempermentor@> wrote:
> > 
> > I'm also guessing that Harry's kids are considered Full Blood if 
> not Pure Blood as all sets of grandparents are magical.  However, 
I don't recall Full Blood being used as a description in the books 
so my assumption is canon weak.

Snape's witch said:
> There's no canon designation of full-blood; only pure-blood, half-
> blood, and muggle-born (and Muggle, of course).  Some people say 
that Harry's and Ginny's kids would be pure-blood but I don't see 
how because Harry remains a half-blood.  Some fans confuse magical 
status with blood status, which isn't the same at all.  If two 
Muggle-borns marry, their children aren't going to be pure-blood 
even though both parents are magical.

Tonks_op
I agree with Snape's Witch. Because Lily was a Muggle born her 
gradchildren would not be pure blood. I am not sure how long the 
blood line would have to go before they would forget about Lily. I 
am not sure that they ever forget about any Muggle born in a family 
line. I remember some reference to that in the books.. but forget 
where. It might have been Sirius when he was explaining the family 
tree to Harry. He said something to the effect that there had to be 
a few Muggles here and there or they would have all died out. But no 
one who values 'pure blood' would ever mention "those people" in 
their family line, I am sure.

Tonks_op