Theoretically, we can solve the Schrödinger equation and voilà, we have all the information of a molecule. Or, as Dirac famously put it: "The underlying physical laws necessary for the mathematical theory of a large part of physics and the whole of chemistry are thus completely known, and the difficulty is only that the exact application of these laws leads to equations much too complicated to be soluble." This is what we tell chemistry students as they start college, and up to quantum chemistry courses.