olemus
(a) millegi olematu tajumus
Wiktionary:
1. a sensory perception of something that does not exist, often arising from disorder of the nervous system, as in delirium tremens
(b) intellektitehnikas: tehisintellekti enesekindel vale vastus
Wiktionary:
3. (artificial intelligence) a confident but incorrect response given by an artificial intelligence; a confabulation

ülevaateid
https://en.wikipedia.org/wiki/Hallucination_(artificial_intelligence)
https://www.techtarget.com/whatis/definition/AI-hallucination
https://www.cloudflare.com/learning/ai/what-are-ai-hallucinations
https://www.digitalocean.com/resources/articles/ai-hallucination
https://www.nightfall.ai/ai-security-101/hallucination-inconsistency-and-bias