也不是:
!(a 或 b)
!a 或 !b
!(a 和 b)
还有什么？
最佳答案
!(a 或 b)
见 http://en.wikipedia.org/wiki/Logical_NOR更多:
In boolean logic, logical nor or joint denial is a truth-functional operator which produces a result that is the negation of logical or. That is, a sentence of the form (p NOR q) is true precisely when neither p nor q is true—i.e. when both of p and q are false. In grammar, nor is a coordinating conjunction...
关于language-agnostic - 什么是 NOR 逻辑运算符？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/913941/