When was the last time you played a 2nd ball because of some doubt or dispute over a Rule? What were the circumstances and how did it work out?
Mine goes back a couple years. I was playing a course for the first time as part of our "club without real estate" tournament series. The 9th hole has the main entry road running along the left side of a dogleg right hole. I pulled my first tee shot and it hit the cart path. When I located the ball it was on the wrong side of the road lying on some grass with a clear shot to the green. The road was not marked with white lines or stakes. There was no indication on the score card that a ball over the road was OB but a couple guys in our group felt it might be OB so I said I would play the original ball in and also go back to the tee and play a second ball under stroke & distance. My original ball was my preferred ball. I scored "6" on the 2nd ball and "5" with the original. After the round the club pro confirmed that the road and opposite side were not OB so bogey "5" was the correct score.