X ______ Y.In terms o f truth condition，if X is true, Y is false, and if X is false, Y is true.
A、is synonymous with
B、is inconsistent with
C、entails
D、presupposes
【正确答案】：B
【题目解析】：X is inconsistent with Y.In terms o f truth condition，if X is true, Y is false, and if X is false, Y is true.