"The two values, however, irrespective of how numerically close they are, share no intrinsic relationship whatsoever." How do we know this statement is true? I

"The two values, however, irrespective of how numerically close they are, share no intrinsic relationship whatsoever." How do we know this statement is true? Is there a way to prove it mathematically? Or is it just an assumption that becomes fact unless someone can prove otherwise?