Go around in circles here but.... you have three tacklers trying to stop a try no conversations with each other trying to do their best but all acting independently, the whole action lasts a second at most at the point ref gets a view he sees ball on floor clearly shown on image, Wardle finger in air was to say he got it down but by that time they have pushed him back away and is a moment later than the grounding. No way on earth from camera angles can anyone for certain say ball doesn't touch white grass. Nor can they for sure say that it's Wardle moving it and not one of the tackling players pulling the arm up while other player pulling arm away in opposite directions. But which ever side you sit we are all bias.
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The images are all different timeline ball is never really stationary Wardle trying get to line one Penrith player pulling to body other pulling away, it does show that the ref does see what he thinks is a grounded ball and is also better placed than any camera. The shape of ball it's position and the run of the line would 100 times out of 100 see this go up as a try, and by the rules in place you can't chalk it off no matter how your bias would like that.
I can live with that just like I'm sure Saints fans can live with Penrith players backing up what many thought last year, that they didn't take last year's game seriously and didn't really prepare for it. We both have it chalked down as a win.