Contradiction?

[prep0strus]

No: HPFGUIDX 176121


> 
> I believe Mad-Eye said something about using things that were magic
> in themselves didn't qualify as spell-casting and so wasn't
> detectable, which of course would include polyjuice potion.
> 
>   Rowena Grunnion-Ffitch
>


Of course, if Harry had known about this previously, Snape would be
even angrier about his pantry, and the Dursleys would be preparing
everything they eat... And for every birthday and christmas gift, I
think harry would be hoping for a magical item with which to torture
Dudley undetected.

~Adam (Prep0strus)