The Light Bulbs

One scientist ran into another. The first one said, I have worked tirelessly and have found 10,000 different light bulbs that do not work. Not to worry, said the other scientist; you have actually found 10,000 parallel universes where they do work, and they are shining their bright lights right now. Who will handle my patents in those other universes? the first scientist joked. Who said you were the inventor in those 10,000 other universes? the other replied.