Combining Texts

You have chosen 'On the Moral and Legal State of Abortion' by Mary Anne Warren, 'Logicism and Ontological Commits. of Arithmetic' by Harold Hodes and 'Two Chief World Systems' by Galileo Galilei

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All the ideas for Knowledge Sources, or select a subheading:
      A. A Priori Knowledge
      B. Perception
      C. Rationalism
      D. Empiricism
      E. Direct Knowledge