A confident but incorrect response given by an artificial intelligence.
A sensory perception of something that does not exist, often arising from disorder of the nervous system, as in delirium tremens.
The act of hallucinating; a wandering of the mind; an error, mistake or blunder.
The entirety of all that is real.
The real world.
The state of being actual or real; realness.
An individual observer's own subjective perception of that which is real.
A real entity, event, or other fact.