Hypercosmic Logic

If something is totally dark, it must also be totally bright.
If something is totally bright, it must also be totally dark.

If something is totally dark and bright,
it must also be totally non-dark and non-bright.

The Perfect Dark-Bright is neither dark nor bright,
nor anything between the two,
but it is still darker and brighter
than darkness or brightness can ever be on their own.

See also: Rule of Three.