The Necker cube is discussed to such extent in Robert J. Sawyer's 1998 science fiction novel Factoring Humanity that "Necker" becomes a verb, meaning to impel one's brain to switch from one perspective or perception to another.
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In Peter Watts' novel Blindsight he postulates that consciousness serves only a set of training wheels for reality and this manifests in our ability to only see one aspect of the necker cube at a time.
The best known example is the Necker cube whose 12 lines can be perceived in one of two different ways in depth.
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