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====Excerpt 17. Peirce (CE 1, 180)====
====Excerpt 17. Peirce (CE 1, 180)====
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<p>There is a large class of reasonings which are neither deductive nor inductive. I mean the inference of a cause from its effect or reasoning to a physical hypothesis. I call this reasoning ''à posteriori''. If I reason that certain conduct is wise because it has a character which belongs ''only'' to wise things, I reason ''à priori''. If I think it is wise because it once turned out to be wise, that is if I infer that it is wise on this occasion because it was wise on that occasion, I reason inductively. But if I think it is wise because a wise man does it, I then make the pure hypothesis that he does it because he is wise, and I reason ''à posteriori''. The form this reasoning assumes, is that of an inference of a minor premiss in any of the figures. The following is an example.</p>
<p>There is a large class of reasonings which are neither deductive nor inductive. I mean the inference of a cause from its effect or reasoning to a physical hypothesis. I call this reasoning ''à posteriori''. If I reason that certain conduct is wise because it has a character which belongs ''only'' to wise things, I reason ''à priori''. If I think it is wise because it once turned out to be wise, that is if I infer that it is wise on this occasion because it was wise on that occasion, I reason inductively. But if I think it is wise because a wise man does it, I then make the pure hypothesis that he does it because he is wise, and I reason ''à posteriori''. The form this reasoning assumes, is that of an inference of a minor premiss in any of the figures. The following is an example.</p>
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<p>C.S. Peirce, ''Chronological Edition'', CE 1, 180</p>
<p align="right">C.S. Peirce, ''Chronological Edition'', CE 1, 180</p>
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<p>Charles Sanders Peirce, “Harvard Lectures ''On the Logic of Science''” (1865), ''Writings of Charles S. Peirce : A Chronological Edition, Volume 1, 1857–1866'', Peirce Edition Project, Indiana University Press, Bloomington, IN, 1982.</p>
<p>Charles Sanders Peirce, “Harvard Lectures ''On the Logic of Science''” (1865), ''Writings of Charles S. Peirce : A Chronological Edition, Volume 1, 1857–1866'', Peirce Edition Project, Indiana University Press, Bloomington, IN, 1982.</p>
====Excerpt 18. Peirce (CE 1, 183)====
====Excerpt 18. Peirce (CE 1, 183)====
