I think this merits its own discussion so I am creating a new thread for it. This was broken off from the Completeness of Quantum Mechanics thread. -MIH If it is labeled as a theory then whatever it is describing has been tested hundreds of times, generally finding the same result each time, with the exception of the occasional outlier. I assume that it is because of these outliers that those experiments cannot be predicted. What is a "complete theory"? To me it just seems like an ironic term. If a theory were truly complete there would be no outliers, and then, just maybe, it would be termed a scientific law.