Combining Texts

You have chosen 'works (all lost)' by Ariston, 'A Conversation: what is it? What is it for?' by Gilles Deleuze and 'An Introduction to Modal Logic' by GE Hughes/M Cresswell

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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