What are XAND and XOR

Question

What are XAND and XOR? Also is there an XNot

Answer 1

In the book written by Charles Petzold titled "Code" he says there are 6 gates. There is the AND logical gate, the OR gate, the NOR gate, the NAND gate, and the XOR gate. He also mentions the 6th gate briefly calling it the "coincidence gate" and implies it's not used very often. He says it has the opposite output of a XOR gate because a XOR gate has the output of "false" when it has two true or two false sides of the equation and the only way for a XOR gate to have its output be true is for one of the sides of the equation to be true and the other to be false, it doesn't matter which. The coincidence is the exact opposite of this because with the coincidence gate if one is true and the other is false (doesn't matter which is which) then it will have its output be "false" in both those cases. And the way for a coincidence gate to have its output be "true" is for both sides to be either false or true. If both are false the coincidence gate will evaluate as true. If both are true then the coincidence gate will also output "true" in that case as well.

So in the cases where the XOR gate outputs "false", the coincidence gate will output "true". And in the cases where the XOR gate will output "true", the coincidence gate will output "false".