短語詞組短語mutually inverse general proposition 互逆一般命題partial inverse negative proposition 偏逆否命題inverse negative proposition 逆否命題mutually inverse special proposition 互逆特殊命題mutually inverse implicational proposition 互逆蘊涵命題inverse and negative proposition 逆否命題partial inverse proposition 偏逆命題 返回 inverse proposition