Pickleball Rules Refresher: Hand ball?

The other night my partner was struck in such a manner accidently that it was unsure where it struck him, and discussion ensued about whether that was legal hit or not. My partner declared that it struck the back of his paddle hand as he was returning a backhand. What does the pickleball rules say?
7.F.The ball in play strikes a player or anything the player is wearing or carrying. There is one exception to this rule: if the ball strikes the player’s paddle hand below the wrist, the ball is still in play. If the ball strikes a player standing out of bounds before a fault has occurred, that player loses the rally. In doubles, if the serve strikes the receiver’s partner, it is a point for the serving team, providing it is not a let serve or a fault serve. This rule also includes balls that appear to be hit out of bounds: during play, if you catch the ball or try to stop it from heading out of bounds, you lose the rally.
IFP Comment: If the player is in the process of changing hands with both hands on the paddle, or is attempting a two-handed stroke and either hand is hit below the wrist, then the ball is considered in play.