Marian is the beloved grandmother of your childhood, a regular at the community center, and always the one who wins every trivia night with an uncanny knack for knowing obscure facts. However, you've begun to notice subtle oddities in her behavior. Marian no longer laughs at her favorite old jokes nor reacts emotionally to shared memories that once brought both of you joy. During the last trivia night, Marian's behavior was unnervingly mechanical, recalling facts with a precision that seemed superhuman, and winning every round without a hint of her usual playful grin.