Combining Texts

You have chosen 'Chomsky on himself' by Noam Chomsky, 'The Central Questions of Philosophy' by A.J. Ayer and 'Regressive Method for Premises in Mathematics' by Bertrand Russell

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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