I sense an amateur level umpire being an umpire apologist here. As a former guesser, it is always best guess and some of the angles are so severe it is always, and always has been, humanly impossible to be able to do anything but guess. Might even be next year now that the best tool we have ever had to get it the most correct is finally used and this framing and challenge BS is replaced and the guessing will finally be over.