I don't buy duality as you present. Two points is just an invitation and opportunity to envision interpolations, extrapolate some spectral scales, wondering about additional dimensions, and fathom how it might interfere with the rest of our representations.
Rights and left are just two points. Intimate mind experiences can modulate interpolations in-between.
Duty and rights are all parts of the same object, it's just a matter of perspective that can make them appear to be separated consideration. Just like creation and constraints. Nothing exists without ontological restrictions that allows its form to happen.