billyu2 wroteCould be, assuming there is contact; but quite often A1 pivots and continues to move (roll) anticipating a possible return pass. In these cases I would think A1 is no longer screening and the contact most likely would be incidental, would you agree?
If A1 pivots and, in doing so, knocks B2 off of A2, it IS a screen no matter what A1 wanted to do. Usually when I see this, it was contact that freed up A2 who is now going down the lane with the ball undefended.