Yin AND Yang: The WaveFunction-
Both are present; in SuperPosition.
Yin OR Yang: Measurement-
Because the Quality perceived is measured by the Observer! It is only Yin when measured FROM Yang; It is only Yang when measured FROM Yin; Yin and Yang mutually set measure.
You cannot fly, because you are measuring the Air from the perspective of Yang.
If you measured from Yin, you would feel your skin capturing the breezes; easefully harnessing the Wind.