What you (and the authors) call "hallucination," other people call "imagination."

Also, you don't know very many people, including yourself, if you think that confabulation and self-deception aren't integral parts of our core psychological makeup. LLMs work so well because they inherit not just our logical thinking patterns, but our faults and fallacies.

what I call it is "buggy garbage"

it's not a person, it doesn't hallucinate or have imagination

it's simply unreliable software, riddled with bugs