Carl Sagan, The Demon-Haunted World: Science as a Candle in the Dark String theory is mathematical description. But there are multiple ways to describe physical phenomena. To date, string theory trails observation, it does not predict it. People have every right to develop it, but like Sagan's dragon, to the extent that it cannot be disproven, it is not a scientific description.“Now, what's the difference between an invisible, incorporeal, floating dragon who spits heatless fire and no dragon at all? If there's no way to disprove my contention, no conceivable experiment that would count against it, what does it mean to say that my dragon exists? Your inability to invalidate my hypothesis is not at all the same thing as proving it true. Claims that cannot be tested, assertions immune to disproof are veridically worthless, whatever value they may have in inspiring us or in exciting our sense of wonder. What I'm asking you to do comes down to believing, in the absence of evidence, on my say-so.”