Words

Courtesy of a conversation with the clever Mr Flashlight:-

Word:

Antinomy:

1 : a contradiction between two apparently equally valid principles or between inferences correctly drawn from such principles
2 : a fundamental and apparently unresolvable conflict or contradiction (MW)

1.opposition between one law, principle, rule, etc., and another.
2. Philosophy. a contradiction between two statements, both apparently obtained by correct reasoning. (dictionary.com based on the Random House Dictionary)

Etymology: Latin --> "antinomia" contradiction between laws