When you talk to your mom and you remember something happening one way, and she remembers it another way, but you both insist you remember it correctly, one of

When you talk to your mom and you remember something happening one way, and she remembers it another way, but you both insist you remember it correctly, one of you is doing what the LLM is doing (filling up gaps of knowledge with bull shit). And even when later you talk about this on meta level, no one calls this confabulation because no one uses that word. Also this is not a psychiatric syndrome, it's just people making shit up, inadvertently, to tell a coherent story without holes. It very much sounds you did the same. Everyone does this all the time.