different between casuistic vs casuistics

English

casuist +? -ic.

casuistic (comparative more casuistic, superlative most casuistic)

Relating to casuistry (attempts to solve moral dilemmas by applying general rules).
Overly subtle, hair-splitting.
- 1855, Sir Richard Burton, Personal Narrative of a Pilgrimage to Al-Madinah and Meccah
  These subjects have exercised not a little the casuistic talents of the Arab doctors: a folio volume might be filled with differences of opinion on the subject, "Is a blind man sound?"

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. From Latin casus, case.

casuistics (uncountable)

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