A. The Cosmologists were the first speculative philosophers to emerge in the West. Below is a list of their ideas. Select the appropriate philosopher for each one.

1. universe composed of colliding atoms
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2. cosmos is one, eternal, and unchanging
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3. essence of universe lies in mathematical relationships
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4. primary substance of nature is air
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5. source of all things is the Boundless
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6. underlying substratum of nature is water
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