Quote: Andy Gilder "The tackle is complete WHEN the ball carrying arm hits the floor and a defender is in contact with the attacking player. After that, the ball carrier cannot look to promote the ball either by passing it or altering its position.
The tackle is complete WHERE momentum ends.
One is a measure in time, the other in position on the field.'"
its not only.the rfl rules which disagree with that interpretation but the laws of space and time. Your interpretation demands we ignore the link between space (where) and time (when) when judging an event.
It is simply impossible for us to have a situation between the ball carrying arm hitting the floor and his momentum stopping where the player is both tackled and not tackled. He is neither, he is in the process of being tackled and as such, by definition the tackle isn't completed.
There was a try scored by harlequins/broncos where a player whose ball carrying hit the deck and.was sliding towards touch who offloaded the ball, never mind simply grounding it, the try was given with the explanation by stuart humming later, that the tackle isn't complete until the momentum stops