Dudley as HBP??!!

[jakedjensen]

No: HPFGUIDX 105578

I think it highly unlikely that Dudley is the half blood prince.

Harry is suppose to be a half-blood. (James-pure; Lily-muggle born). 
So, unless Vernon is a wizard (highly unlikely), Dudley, at best, 
could only be a muggle-born. One might be able to call a half-blood 
a muggle-born (say, if you are a blood purest of the strickest ilk), 
but it makes little sense to call a muggle-born a half-blood (half-
of-what?).

I do think there is more to Petunia (not the HBP, but possibly the 
one to develop magic late in life...possibly, but even that seems to 
be a bit of stretch...Filch is a better candidate for that...in my 
opinion). 

Someone might be able to convince me if they show me some text to 
back it up, but on it's face....Dudley appears ineligable for the 
title of half blood prince (if it means what we think it means).

Jake