[blml] uninteresting question - HELP!

[Manuela Mandache]

> South is declarer in 4S. At trick 4, he calls Sx from dummy,
> East follows Sx, he plays SQ, and West discards C4. Declarer
> plays CA, West pulls C8 from his hand, moves it towards the
> table (everybody sees it, but it's not actually played),
> then withdraws it saying, "Sorry, was that Spades the previous
> trick? I have some Spades..."
>
> Is the revoke established? In other words, should "a defender's
> card [...] must be played" be read "a defender's card [...] is
> considered played" in L45B1?

Sorry to annoy you with this question again, but as the answers
have been split in two exact halves between "yes" and "no", I still
don't know how to rule such a case... thank you.

Best regards,

Manuela