Illegal motion or shift?

[Robert Goodman]

Originally Posted by mbcrowder

It is not common sense to intentionally rule on the same exact action differently between instances,

I bet you do this frequently without so much as a 2nd thought. For instance, the surrounding circumstances could be such as to change intentional grounding into no call for the exact same throw and disposition of the other players. Same for USC, where an action might be interpreted as friendly or mean-spirited, depending. You could have the exact same collision under different circumstances be pass interference on one player, the same on his opponent, or a nothing.