I cannot believe this is a debate.
Casebook 4.4.5 SITUATION clearly states that throwing the ball up against the backboard is considered a dribble. So if the player has already dribbled, this is double dribble if the dribble had ended by a player picking the ball up and throwing it against the backboard. It is only legal if not dribble has started. But usually this is not the case.
Peace
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Let us get into "Good Trouble."
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Charles Michael “Mick” Chambers (1947-2010)
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