&gt;And you don&#x27;t know that a priori.<p>But nobody said it was &#x27;a priori&#x27;. It comes from thousands of experiments which probed relevant energy levels, over a period of decades.<p>&gt;It&#x27;s possible that with a hightened level of simulation, and accurate measurement of an unusual phenomenon, some fine structure emerges.<p>Sure, in fact we know the Standard Model is incomplete because it doesn&#x27;t take into account dark matter.