The same is true for true and false. What meaning gets attached to Boolean values is immaterial to how they act. That null is implemented oddly doesn't negate

The same is true for true and false. What meaning gets attached to Boolean values is immaterial to how they act. That null is implemented oddly doesn't negate the fact it's a meaningful and well defined mathematical construct. I don't see people saying false doesn't exist because forth implements it as -1.