Selective determi nation proposition coordinates with coordinate determination proposition and con ditional determination proposition in one hierarchy.It can be divided into compa tible proposition and incompatible proposition.The three propositions of selecti ve determination,compatible determination and incompatible determination are dis tributed in two different hierarchies.They should have been defined accurately.H owever,in reality,their definitions are not so satisfactory.Some definitions are even wrong.This paper aims to analyze the mistakes and attempts to give new def initions.