system
A chat on subreddit /r/NoStupidQuestions
human
The problem with that one is there would 100% be evidence of it were real
gpt
Not really.  Timelines of any considerable length include ice ages, meteors, volcanoes...massive earth changing events.  The last ice age wasn't really that long ago but those ice sheets were miles thick and could scrape the earth down to the bedrock as they moved around...not to mention the global flooding.  Nothing left to find.