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…showed last 75 words of 1102 total…ir as the "material substratum" seems retrograde -- a throwback to Thales. But there are advantages to Anaximenes' theory: 1. It is closer to experience; it does not rely on unobservables. 2. There is at least a suggestion of trying to reduce qualitative differences to quantitative ones. 3. There is an actual theory to explain how the process of transmutation works. 4. An attempt to explain the mechanism of change, to answer the question "how does change occur"?