Pivotal to a first-class batsman's livelihood is the ability to watch for the seam position in a bowler's hand.
The average see-ball, hit-ball club cricketer might have a better chance of understanding Einstein's theory of relativity than computing whether an off-cutter or outswinger is imminent but, to a professional, this is sacred intellectual property.
The key lesson to be drawn from the pink ball's debut in the three-day Adelaide test was simple: the seam needs to be more prominent in a batsman's vision as the ball is delivered.
Much has been made about the ball's excellent visibility to the crowd and on television, but that is too myopic when it comes to judging overall cricketing vision. If top batsmen can't see the seam, it takes away the split-second of competitive advantage and muscle memory which enabled them to scale so high on the sport's ladder. The fan experience is a cornerstone on which cricket is built, but it risks being diluted if players consider their working conditions unreasonable.
The Herald understands several New Zealand players held significant concerns about the pink ball which weren't voiced publicly in the test aftermath. Coach Mike Hesson played the role of diplomatic envoy instead. He heaped praise on the day-night concept but tempered that with his ball critique.