I've been trying to understand whether on not Kant accepts the atomic model (that matter is composed of smallest pieces) based on his writings in Metaphysical Foundations of Natural Science.

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    Hello : do you need to use the German 'Modell' rather than the English 'model' ? If you do, 'modell' should be capitalised to 'Modell'. But anyhow, welcome to PSE. Best - Geoffrey
    – Geoffrey Thomas
    Jan 27, 2023 at 14:08
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    Maybe "Das ist Wunderschön"?
    – J D
    Jan 27, 2023 at 14:28
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    Nothing good. "In the Metaphysical Foundations the aether clearly has a merely hypothetical status. To be sure, Kant appears to be convinced of its existence, and he accordingly vigorously opposes a natural philosophy based on atoms and the void. Yet he also firmly asserts that it is not possible to rule out such an atomistic philosophy a priori". Friedman, Kant and Exact Sciences, p. 217. Later (in the so-called Transition manuscript of 1799) he changed his mind for the worse and attempted to deduce aether and rule out atomism even a priori, ibid. p. 221.
    – Conifold
    Jan 27, 2023 at 15:32
  • @Conifold - Yeah that is interesting, because a lot of old philosophy that could not be informed by the latest advances in science can be regarded as "obsolete". Less to read hahaha
    – Frank
    Jan 27, 2023 at 20:15
  • Kant's Second Antinomy deals precisely with atomism. Antinomies are basically contradictions between rational phenomena that appear to be true simultaneously, while reason would be illusory (Transcendental Dialectic). The second antinomy presents the contradiction between the rational certainty that there must be an indivisible (the atom), and the notion that tells that parts are always wholes that can also be divided in parts recursively.
    – RodolfoAP
    Jan 28, 2023 at 5:34


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