Quiz Answer:   A ball is only deemed to have ‘moved’ if it leaves its position and comes to rest in any other place. Also, Rule 18-2a(i) permits a player to touch his ball in the act of addressing it.  So, in this situation, Rocco cards his birdie.

This is confirmed in Decision 18/2, ‘Q. In addressing the ball, a player accidentally causes the ball to oscillate, but it returns to its original position. Has the ball ‘moved’ A. No.’