Well Which Is It

JavaScript: "NaN stands for 'Not A Number'"

Also JavaScript: typeof NaN returns 'number'

This is peak JavaScript energy right here. The language literally created a special value to tell you something isn't a number, then categorized it as a number. It's like labeling a vegetarian dish "Contains No Meat" and listing the first ingredient as beef. Just another day in JS wonderland where nothing makes sense and we're all pretending it's fine.