逻辑上，根据所比较的值的类型和所使用的语言，可能会有差异.例如:

Logically there can be differences depending on the type of value that you are comparing and language you are using. For example:

x == false表示x != true，但x != true并不总是表示x == false，因为x也可以是一些无意义的值.

x == false implies x != true, but x != true does not always imply x == false because x can also be some nonsense value.

1 + 1 = 3都是== false和!= true.

7 > cat都不是== false和!= true，因为它是无意义的.

7 > cat is neither == false and != true since it is nonsense.

x = null是!= true，但不是== false.