Combining Texts

You have chosen 'Philosophical Essay on Probability' by Pierre Simon de Laplace, 'First Things First' by Earl Conee and 'On 'The Beginning of Philosophy'' by Ludwig Feuerbach

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature