The relationship between two facts about the same attribute of a phenomenon. In a sense, the two facts are referring to the same phenomenon from two points of view. The two facts may be naturally inseparable, such as the two truths about the phenomenon, or they may constitute a joined inseparability arising from the power of meditation, such as a blissful awareness and an awareness of voidness. Some translators render the term as "one by nature."
Tibetan: ngo-bo gcig
J Hopkins: one entity; same entity.