This might be a stupid question but I'm a stupid person so it kind of fits. I'm a fan of Mr. Kaku's website and his articles. He makes me think about all the possibilities out there in our universe. My question is how do we know our mathematics is correct? The most math I ever took were a few algebra classes so I'm the last person to question brilliant people like Newton or Einstein. How can you prove math with math? Any comments good or bad would be appreciative so I can maybe look at this in a different way. Thank You.