What type of logic gate will output true only when all inputs are false?

The correct response is the NOR gate because it operates by producing a true output only when all of its inputs are false. In other words, it functions as a NOT operation applied to the OR gate. When all inputs to the NOR gate are at a low logic level (false), the output is high (true). If any of the inputs are high (true), the output will be low (false). This inversion characteristic is what sets the NOR gate apart from the other types of logic gates listed.

The OR gate, for example, would output true if any of its inputs are true, while the XOR gate outputs true only when an odd number of inputs are true. The AND gate requires all inputs to be true to produce a true output. Thus, only the NOR gate meets the condition of outputting true solely when all inputs are false.