I own a copy of The Rules of Golf, and let me just say, it is close to impossible for any human (with a life) to know everything packed into this text. Yes, I visit the Rule–a–day website every so often to test my golf acumen, but some of the rules never cease to amaze me.
I know I have to play the ball as it lies, and when to hit a provisional ball, but what I didn’t know is that dung is not dung, it’s actually a loose impediment.