Slab
Occasional Tour Caddy
Disagree with your assumption. The ruling bodies decided that the Rule had not been breached because the caddie was not in a wrong position when the player began taking his stance for the stroke.
But the on course rules guys (representing the USGA/R&A) must have been locked in with 100% certainty that the caddie was in the wrong position, otherwise they wouldn't have issued the penalty.
It wasn't a case of doubt or maybe yeah/maybe no... or they wouldn't (couldn't) penalise. This isn't a decision that had to be made in realtime without the benefit of video footage, thy had hours to determine it
How do you go from nailed on 100% breach to no breach?