The Cup as Portkey Question

[Court6702 at aol.com]

No: HPFGUIDX 14075

--- In HPforGrownups at y..., "Trina" <lj2d30 at g...> wrote:
> "Horst or Rebecca J. Bohner wrote in response to my portkey theory:
> > Trina --
> > 
> > Only one problem with your logic.  It tells us why the Cup was 
> rigged to return to Hogwarts, but it still doesn't tell us why they 
> used the Cup for the portkey and didn't use something far simpler 
> like (as you suggested, to my considerable amusement) Harry's 
> toothbrush.  Surely *that* could have been enchanted to return 
> Voldemort & Co. to Hogwarts just as easily as the Cup?

Here is another problem about the Portkey.  This group might have 
discussed this already but as I have just joined I wouldn't know.  
How is it that the Portkey worked when in the beginning of the book 
Arthur Weasley stated that Portkeys worked at predestined times?  
Moody couldn't possibly have known the exact time in which Harry and 
Cedric were to be touching the Cup.
-Courtney