Combining Texts

You have chosen 'The Runabout Inference Ticket' by Arthur N. Prior, 'Mathematics, Science and Language' by Luitzen E.J. Brouwer and 'Summula philosophiae naturalis' by William of Ockham

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All the ideas for Mathematics, or select a subheading:
      A. Nature of Mathematics
      B. Foundations for Mathematics
      C. Sources of Mathematics