| His development of the pole and polar lines associated with conics led to the principle of duality. |
| But our poem's horizon expanded far beyond this confined duality to embrace the universal, the human, as well as the intimate and personal. |
| It is a duality that only the most mushyheaded of his admirers can blissfully ignore. |
| Just how Gilliam's duality came about is unclear, but he apparently mastered it early in life. |
| Despite her good deeds, this wizened enchantress's sinister duality surfaces when she senses the threat of a changeling among the Quinn clan. |
| I know it looks like the old positivist duality, but it does give some insight into the way that political romanticism poeticizes politics. |
