#antinomical

• Antinomic — Containing an antinomy or relating to an antinomy; expressing a profound and seemingly insoluble contradiction between two laws, principles, theses, or conclusions, even though each of them is considered valid, logically demonstrable, or historically and legally justified.
• Aporeme — A difficult problem, a theoretical dilemma, or a seemingly insoluble logical paradox that arises in reasoning when two contradictory arguments appear equally well-founded and rational; a statement that generates an aporia. In Aristotelian logic or scholastic disputes, the concept denotes a conceptual knot blocking rational deduction until contradictions are resolved.