For example, Ernst Mach—who advocated for a version of Occam’s razor, which he called the Principle of Economy—claimed that molecules didn’t exist because they were too small to detect directly. It can be argued that atoms do no exist, and that in fact, the material universe does not exist. For example, Ernst Mach disliked atoms (and Ludwig Boltzmann personally). Mach and the atoms The situation is quite different with respect to the existence of atoms. Much like the contemporary irrational critics of string theory, Mach argued that atoms were too small to be observed directly. Physicist Ernst Mach, as far as I know, never accepted atoms as anything other than a useful fiction. Sense perceptions were the only reality, all else was hypothetical. Ernst Mach (1838-1916). Nature exists once only. This is a question of metaphysics. The atoms in our air today very much has the possibility of once having belonged to Shakespeare, Genghis Khan, Hitler, and the like. ... Boltzmann’s lecture he declared abruptl y “I don’t believe that atoms exist”. ... One physicist, Ernst Mach (after whom the speed Mach 1 is named), remained skeptical. rejected it. ), 'Space and Geometry from the Point of View of Physical Inquiry', Space and Geometry in the Light of Physiological, Psychological and Physical Inquiry (1906), 138. Useful discussions of Mach’s early work can be found in S. Brush, `Mach and Atomism’, Synthese 18 (1968), 192–215. Mach thought that the only real things were those that we could see, feel, hear and touch—things accessible directly to our unaided senses. One can leave open the question of the existence of atoms and still work theoretically with the hypothesis that atoms exist. Some philosophers, like Ernst Mach (1838-1916), questioned whether atoms were really real. It has been a hotly debated topic between the essentialists and the existentialists for quite some time. Spoiler alert: atoms exist.) The young Ernst Mach did this until the mid-1860s. What he didn’t accept was the existence of atoms. The former advocated for atomism while the l atter . This conflict is given little attention in Pullman’s book. In Ernst Mach and Thomas J. McCormack (trans. Ernst Haeckel and Ernst Mach. And for such a comment to come from a highly regarded scientist like Ernst Mach, it … After one of Boltzmann's lectures on atomic theory in Vienna the great Austrian physicist Ernst Mach stood up and said simply, "I don't believe that atoms exist!" Let us now examine the attitude of Machism, as a philosophical current, towards the natural sciences. Originally written as an article for The Monist (1 Oct 1903), 14, No. Mach told Einstein that he accepted the utility of the atomic model in physics. That's why the atomic hypothesis was unwarranted and "insufficiently economical" for Mach. We had been warned. It was both cutting and dismissive. 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