VERTICALITY-Verticality applies to a legal position. The basic components of the principle of verticality are:
Legal guarding position must be established and attained initially, and movement thereafter must be legal;
From this position, the defender may rise or jump vertically and occupy the space within his or her vertical plane;
The hands and arms of the defender may be raised within his or her vertical plane while the defender is on the floor or in the air;
The defender should not be penalized for leaving the floor vertically or having his or her hands and arms extended within the vertical plane;
The offensive player whether on the floor or airborne may not clear out or cause contact that is a foul;
The defender may not "belly up" or use the lower part of the body or arms to cause contact that is a foul outside his or her vertical plane.
That last play of the game really made me question exactly what the Rule of Verticality is. According to this definition, the important part bolded which really affects that play, the defender is allowed his vertical space if he has already established it, and doesn't need to have his hands or arms in a certain position, as long as they don't encroach horizontally towards the opposing player.
Now, I've looked at the replay a lot of times now, and I believe that the right non-call was made, based on the details of the verticality rule. Kwame had CLEARLY established himself inside the paint and thereby is allowed his own vertical space to move in. The real issue comes with his left hand which makes contact with Lowry's body. According to the rule though, Kwame is allowed any movement in his vertical space, as long as he does NOT initiate the contact with the player. The replay CLEARLY shows Lowry jumping INTO Kwame, and Kwame merely staying his ground and jumping STRAIGHT up, which he is allowed. His left hand does NOT move forward to initiate the contact with Lowry, but was merely used to shield him from Lowry.
I just felt this needed clarification since it was the single most important play of the game. Hope it eases some people's minds that it was a legit non-call, albeit, a TOUGH one to judge.