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actual and virtual

A modal distinction proposed by French philosopher Gilles Deleuze as a replacement for the problematic real-possible distinction more commonly used in philosophy. The possible is a bad ...

virtual reality

virtual reality n.   Quick reference

A Dictionary of Psychology (4 ed.)

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... reality n . A computer-generated perceptual simulation of a three-dimensional image or environment with which the viewer can interact, often requiring a headset or goggles providing visual stimuli and gloves or other bodily attachments fitted with sensors. In a typical virtual reality display, turning the head produces an appropriate change in what is seen, and moving a hand activates a corresponding movement of an image of a hand in the display. The term, which became popular in the 1980s, is based on the concept of a virtual image in optics, which...