Combining Texts

You have chosen 'Amphitheatrum' by Julio Cesare Vanini, 'On the Algebra of Logic' by Charles Sanders Peirce and 'Naturalism in Mathematics' by Penelope Maddy

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All the ideas for Thought, or select a subheading:
      A. Modes of Thought
      B. Mechanics of Thought
      C. Content
      D. Concepts
      E. Abstraction