1 v 1, attacker has possession in the D going towards goal. Defender tackles but lifts ball into attackers knee. Advantage played and attacker goes onto score. Is it right to play advantage even though the ball has hit the knee? Or is it unfair to allow the attacker to gain an advantage with ball hitting her body ? I.e. should the foul have been blown immediately resulting in short corner? If so, how is it an unfair advantage to gain from defenders mistake?