[HPforGrownups] The sorting hat seems to think Harry is a pure-blooded wizard.

[Sherry Gomes]

No: HPFGUIDX 105702

Jenny said

  I'm sitting here watching the ABC Family showing of Harry Potter and the
Sorcerer's Stone movie and it suddenly occurred to me that the sorting hat
does seriously consider putting Harry into Slytherin.  We also know, from
the
Sorting Hat's New Song in OoP, that Slytherin house only takes pure-blooded
wizards.  Putting two and two together I come out with Harry being
considered
a pure-blood wizard, suggesting that the mere fact that Lily was in fact a
trained wizard nullifies the fact that she, herself, was muggle-born.

Sherry replies

When I read SS/PS, I don't get the idea that the sorting hat wanted to place
Harry in Slytherin.  When the hat starts to mull it all over, Harry is the
one to say, 

"not Slytherin."

At that point, the hat begins to tell Harry about how Slytherin could
benefit him, but when Harry continues to wish not to be put there, it sends
him to Gryffindor.  My feeling is that it was Harry's thinking not Slytherin
that initiated the whole "discussion".  There's no way to know if the hat
would have considered Slytherin, if Harry hadn't brought it up.  

Harry seems to me to be very definitely a Gryffindor.  Actually, I think he
possesses a bit of the characteristics of all the houses, as I suppose
almost anyone would, but the Gryffindor qualities seem to be most
predominant.

Sherry G