[KampfHase]

[ QUOTE ]
Whether the rule should be enforced is another story, though.

[/ QUOTE ]
As mentioned in my last post, I understand that concept now, since pfapfap pointed out that other statement of RRoP (see above).
I still think it should be enforced, since the rules were known in advance. However, I now understand why one would not enforce it.

I actually did email Mr Ciaffone. Here's what he wrote:

[In email 1, I asked Mr Ciaffone about this. Here's what he answered:]

Reply to email 1:
[ QUOTE ]
"I believe the person making this ruling has the authority to rule either
way. Two rules come into play and conflict. With no other info other than
what has been provided, I would give the pot to the K-Q. However, I would
want to know more, like exactly why the player with the ace did not
(refused? ) show his sidecard. If he was asked to do so by the player, why
did the dealer not also ask him to show it? Did player A throw his hand
away because he thought he was beat? As you see, I do not feel I have the
complete story here yet."

[/ QUOTE ]

[In email 2, I quoted an excerpt of the post and sent it to him.]

Reply to email 2:
[ QUOTE ]
"He should be told that he needs to show the card. He should be allowed to
turn up the other card from the discards, if he discarded before being told
to show it. If he has intermingled his hand so badly the card cannot be
retrieved, or if he wants to thumb his nose after being told to show, he
should lose the pot. I would treat it no differently than a player showing a
hand to the person on his right or left, but never face-up; the hand was not
shown to the table."

[/ QUOTE ]

[In email 3, I re-asked him how he would rule in the situation in question and whether the pot should be awarded to the violator.]

Reply to email 3:
[ QUOTE ]
"I would allow him to retrieve the card and show it if he was not warned
ahead of time that he had to show both cards. If he was asked to show the
hand before he mucked it, I would rule it dead. This is not a matter of
rules; it is how I feel the situation should be handled."

[/ QUOTE ]

(If you are interested in the whole dialogue, please, let me know, and I'll post all of it.)