Which gate means "not exclusive or"?

The term "not exclusive or" refers to a logical gate that outputs true when both inputs are the same, whether they are both true or both false. This is the defining characteristic of the XNOR (exclusive NOR) gate. The XNOR gate essentially takes the XOR (exclusive OR) logic, which outputs true only when the inputs differ, and inverts that output. Therefore, it provides a true output when both inputs are either 0 or 1.

In other words, the XNOR gate produces true (or 1) when both inputs are the same. This makes it directly related to the concept of "not exclusive or," as it ensures that both inputs being the same results in a true outcome, which is the opposite of what an XOR gate does. The other options refer to different logical operations that do not align with the function described.