Seinfeld , one of the most successful shows in television history, was purportedly about nothing . Of course that was never true. The show was about a few people with consistent personality quirks, a bit narcissistic and socially challenged (and challenging). Still, people like to say it was "about nothing," not taking the word too literally. When physicist and outspoken atheist Lawrence Krauss talks about the scientific concept of nothing , he isn't literally talking about nothing, either. In his view, if nothing is a scientifically legitimate concept, then it refers to something measurable. You can quantify it somehow. I agree. Science deals in the quantifiable and measurable, after all. It does not deal in that which cannot, in principle, be measured one way or another. Yet it's plain as day that, if you can measure some x , then x does not equal nothing . If you can measure it, it isn't nothing. And so we must admit ...