Why sort half-blood Riddle into Slytherin?

[Bex]

No: HPFGUIDX 108557

kmc asked:
I want to know how Tom Riddle with his half-blood hertitage got sorted
> into Slytherin?
> 
> Could there be other "half-bloods" in Slytherin?


Well, who would be more deserving of a place in Slytherin than 
Slytherin's heir himself? Not to mention, he had the personality 
qualities that befit a Slytherin.

Actually, I think it's really funny that Tom Riddle was a half-blood, 
and the last of his family line, and he was the descendant of ol' Sal 
Slytherin, who seemed to place purity of blood over anything else 
when measuring a wizard's worth. Probably had poor old Sal spinning 
in his grave.

Another thought: we know LV/TR isn't the HBP. What if it is someone 
in his bloodline, like Sal Slytherin? It could explain why he put so 
much focus on purity of blood.

Anyway, that's why. And regarding other "half-bloods?" I doubt it. 
There would have to be a really good reason, like when the Hat said 
Harry would do well in Slytherin, it was because even though his 
mother was a muggle-born, so he wasn't pure-blood, he had so many 
qualities like TR did (explained in CoS by Dumbledore as "Voldemort 
had tranferred soem of his powers to you [Harry]"). So it's possible 
that some of the Slytherins have muggle blood in them (through 
probably way WAY up the family tree). In fact, I would venture to 
guess that nearly all of them do if you could trace the family lines 
back far enough. After all, Sirius said that all the pure-blood 
families have been mixing for a while now, so they're all related in 
some way or another, so without ANY non-pure blood, inbreeding is a 
serious threat. And it's possibly rearing it's ugly head already with 
Crabbe and Goyle. :)

~Yb