casuistry

noun5

1. •
   The process of answering practical questions by means of interpretation of rules, or of cases that illustrate such rules, especially in ethics; case-based reasoning.

   • Cages for Gnats, and Chains to Yoak a Flea; Dry'd Butterflies, and Tomes of Casuistry — 1714
2. •
   An intricate argument.
3. •
   (disapproving) Hairsplitting, argument with quibbling detail.
4. •
   (disapproving) Sophistry, a specious argument designed to defend an action or feeling.

   • I felt it was hopeless to argue against casuistry of this nature, which, if it were carried to its logical conclusion, would absolutely destroy all morality, as we understand it. — 1886
5. •
   (disapproving) Legalism, argument concerning the text of a written law against all other factors.