Russ Chewning said:Actually, the rule as stated from the WPA rulebook does cover this.
World Pool-Billiard Association
World Standardized Rules
http://www.wpa-pool.com/index.asp?content=rules#20
20. Cue ball fouls only
If there is no referee presiding over a match, it may be played using cue ball fouls only. That is, touching or moving any ball other than the cue ball would not be a foul unless it changes the outcome of the shot by either touching another ball or having any ball, including the cue ball, going through the area originally occupied by the moved ball. If this does not happen, then the opposing player must be given the option of either leaving the ball where it lies or replacing the ball as near as possible to its original position to the agreement of both players. If a player shoots without giving his opponent the option to replace, it will be a foul resulting in cue ball in hand for the opponent.
When the six hit the side of the cue, it bounced back into the area it previously occupied, and therefore did change the outcome of the shot. Although it is not technically in the spirit of the rule as far as the possibility of having another ball come into the area that the ball was supposed to have been in.
Now, here is another way to handle it. If your opponent does not agreee it is a foul (being a rather bad sportsman, I would say), then you take the option to replace the 6 ball where you "think" it was.
In the middle of the table at the worst possible angle.
Just kidding, just kidding. I would simply stick to my guns and tell my opponent, "Hey, I know it is cue ball fouls, but you changed the outcome of the shot. It's a foul. It's ALWAYS a foul when you change the outcome of the shot and the ball can't be replaced."
Rss
This is precisely what I mean by the need for a more thorough set of rules. The scenario described by the OP is a foul. Why is it a foul? Because in any event that has a WPA referee, he's going to call it a foul. The description for rule that you cited is simply incomplete. I mean, I understand some of this has to do with role of the WPA versus BCA and what ever happened to the BCA rules but the fact is, in the US, most WPA events are BCA events. The referees are BCA referees. The book they're citing is much bigger than this page you linked us to.