Combining Texts

You have chosen 'Transworld Identity or worldbound Individuals?' by Alvin Plantinga, 'Il Saggiatore ('The Assayer')' by Galileo Galilei and 'The Evolution of Logic' by William D. Hart

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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