There is a lot of confusion about Slater's juggling effort, but whether what he did [ishould[/i be allowed isn't the point.
Some seem to be confused as to what a knock-on actually is. I know why. It is because they equate "knock on" with an infringement. The rules (as has been pointed out) mean that when a player has knocked on, then the ref needs to wait to see if the player regians or kicks the ball before it touches anything else. If he does, then it is play on. And yes, ithat is a "knock on" (as defined by the rules) and no, it is not a "knock on" in the sense of an infringement. If you do knock on,
ACCIDENTALLY, therefore, you can neutralise it in the way prescribed:
Quote knock onSection 10
Accidental 2. If, after knocking-on accidentally, the player
knocking-on regains or kicks the ball before it
touches the ground, a goal post, cross bar or an
opponent, then play shall be allowed to proceed.
Otherwise play shall stop and a scrum'"
So far, so good.
But then the referee also must judge the player's INTENTIONS.
Quote knock on
Section 10
Deliberate 1. A player shall be penalised if he deliberately knocks
on or passes forward.'"
The reason for this distinction lies in section 5 of the laws:
Quote knock onSection 5 - Mode of Play
3. Once play has started any player who is on side or
not out of play can run with the ball kick it in any
direction and throw or knock it in any direction other
than towards his opponents’ dead ball line'"
Now, that quote very clearly is referring to deliberate actions, and not accidental contacts. And states unequiviocally that you cannot knock the ball towards your opponents' dead ball line.
And so all you need to know is whether Slater deliberately knocked it forward, or whether it was a pure accident, i.e. he didn't mean to do it, it was a pure accident.
It seems blatantly obvious that his actions were intentional, and that the referee (or given the chance, the VR) should have stopped play.
The Inglis try was yet another in a long, infamous catalogue of horrible VR mistakes. If we had not had the benefit of the "shot from behind", then it would for me just about be a "benefit of the doubt" try - given the modern interpretations of grounding the ball. But as soon as you saw the "shot from behind" then it is 100% clear that the arm knocks the ball, and ball and arm part company, so a blatant no-try. The neverending capacity of our VRs to get obvious decisions regularly wrong remains a blot on the RL landscape.