1. in a manner that uses clever but misleading reasoning to justify something wrong or questionable
Usage: often implies dishonest or evasive argumentation

Examples

• He casuistically argued that breaking the contract was justified because of a minor technicality.
• The lawyer casuistically twisted the facts to support her client's dubious claim.
• She casuistically reasoned her way out of responsibility by exploiting loopholes in the agreement.
• The politician casuistically defended the unpopular policy with convoluted logic.
• He casuistically reinterpreted the rules to allow behavior that was clearly against their spirit.