Why Harry Potter "cannot" be set in 1991-?

[Geoff Bannister]

No: HPFGUIDX 79404

--- In HPforGrownups at yahoogroups.com, "Catlady (Rita Prince Winston)" 
<catlady at w...> wrote:

<previous notes snipped>

> 
> Dudley chucked his Playstation out the window, thus was no longer 
> able to play Mega-Mutilation III, in GOBLET OF FIRE, set in 1994, 
> when (the list has agreed) Playstations were not yet available in 
UK 
> or US, but had been test-marketted in Japan.
> 
> I am not aware of any reference to a Playstation in HARRY POTTER 
AND 
> THE PHILOSOPHER'S STONE. Please give me a quote with enough context 
> that I can find where in the book to look it up and see if 
Scholastic 
> changed it.

Geoff:
The only reference I can see in PS (p.21 Bloomsbury UK edition) 
is "..watched Dudley unwrap the racing bike, a cine-camera, a remote-
control aeroplane, sixteen new computer games and a video 
recorder...."