"Theoretical physicists like to ask the big questions: How did the Universe begin? What are its fundamental constituents? What are the laws of nature that govern these constituents? The smallest constituents of matter are, by definition, the s. But what is an elementary particle, exactly? How do we know when we have reached the bottom line? Well, it turns out to be easier to say what an elementary particle is not."
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(quote on pp. 2–3)
https://en.wikiquote.org/wiki/Michael_Duff_(physicist)
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Michael Duff (physicist)
(born 28 January 1949) is A British theoretical physicist. In 2017 he was awarded the .
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