Unreality is absence of something for the individual hidden

The thinker is himself absent.

The experience of absence is the experience of, that what happens around you, and with you, doesn´t concern you, that you are  not in it, not are involved.

You are  not here, nor other places, but outside in the meaning absent.

You are shortly said not present.

That will say that your actual being is hidden for you, you are ignorant about what you are.

Unreality is something for the individual hidden. It is something for the individual hidden. It is a specific state, a suffering emptiness, a being outside. You are not your activity. You are something else than your activity, or rather: your activity is something else than yourself.

Unreality is weightlessness, that existence is without weight, which Milan Kundera was seeking to depict in his novel The Unbearable Lightness of Being: the lacking presence, and the weightlessness.