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1 " As string theorists march on in their quest for the theory of everything, whilst also leaving a trail of mathematical gems along the way, some traditional physicists were outraged: “Is physics no longer rooted in observations of nature? Or is this theology?” I couldn’t help but notice a striking parallel with the way mathematics became detached from physics during the nineteenth century and, in particular, the outrage that accompanied Cantor’s transfinite set theory and Hilbert’s non-constructive proofs. Was the kind of mathematics that could never be exhibited with real objects actual mathematics, or was it theology? With the benefit of hindsight, we now know that the mathematics flourished like never before during the twentieth century. One can only hope the same thing happens with string theory in the decades to come. "
― Xi Yin
