Potential Weakness. Consistency plays a critical role for reliable result in science,engineering or math. Unlike any other common stats, True shooting percentage is a bad definition because of inconsistency. The coefficient 0.44 is related to ratio in FTAs from 2 point or 3 point possessions in NBA and and-1 attempts. If all FTAs are from 2 point shooting foul possessions, the coefficient should be 0.5, 0.333 for all 3 point shooting foul possessions, and 0 for all and-1 possessions. For different leagues or in different era, the FTAs ratio is different. It is questionable to use same true shooting percentage formula on those leagues unless the coefficient 0.44 is being adjusted. This raises another question that the true shooting percentage is not comparable for different leagues, age, gender, etc, even for different era.