Rule question
 

If the ball plugs on a soft green, I believe I'm correct in saying you can mark the ball, repair the mark and replace the ball. I know it is a somewhat hypothetical question as it is unlikely to ever happen, but what happens if the ball has plugged on a part of the green steep enough that the ball can't be placed there without rolling away?

You find the nearest spot not closer to the hole where it will come to rest.

d. Ball Fails to Come to Rest on Spot

If a ball when placed fails to come to rest on the spot on which it was placed, there is no penalty and the ball must be replaced. If it still fails to come to rest on that spot:
(i) except in a hazard, it must be placed at the nearest spot where it can be placed at rest that is not nearer the hole and not in a hazard;
(ii) in a hazard, it must be placed in the hazard at the nearest spot where it can be placed at rest that is not nearer the hole.
If a ball when placed comes to rest on the spot on which it is placed, and it subsequently moves, there is no penalty and the ball must be played as it lies, unless the provisions of any other Rule apply.

Thanks!