Quote: ccs "You're absolutely sure there was a knock on?'"
I think there was conclusive evidence.
However the fine distinctions between certain, beyond reasonable doubt, confident etc. are difficult for the VR when things are sent up with an on field decision. Assuming the VR saw Griffin’s fingers move, I think the VR must have taken the question to be ‘is there a theoretical possibility that’s caused by something other than contact with the ball?’
And, tbf, absolute certainty is impossible. Of that I am absolutely certain.