Combining Texts

You have chosen 'Preface to 'Principles of Philosophy'' by René Descartes, 'Explanatory Coherence' by Paul Thagard and 'Whitehead and the Rise of Modern Logic' by Willard Quine

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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