“Is the possession determined by him taking one of the listed actions, or is it determined by him having long enough to take one of the listed actions whether or not he does?”

This is only talking about situations where the receiver gets two feet down but doesn’t control the ball all the way to the ground. If he…

Worse than the guy at the blackjack table who constantly calls it poker?

...become a good rapper who makes good songs, or get out of the way to make space for someone who will.