This raises an interesting question: if some time traveler really did tamper with things, what would the evidence look like? Is there anything that could have only happened with knowledge from a now defunct timeline?
Then there’s the horror that it is actually happening and this is somebody’s idea of a repaired timeline.
Scene: on the far wall of the room is a small intercom. It is connected to a hospital wide-AI, that is tasked to converse with patients, especially when the noise threshold exceeds 66Db. The intercom springs to life after hearing these very loud complaints, and begins to speak in a soothing, if not slightly robotic, voice.
AI health assistant: Sarah, remember what we talked about? That was 30 years ago. Silberman died 15 years ago. Please stop disturbing the other patients and eat your pudding.