system
A chat on subreddit /r/me_irl
human
What about the Ice Age?
gpt
That's technically prehistory. 

Wikipedia:

&gt; History (derived from Ancient Greek ἱστορία (historía) 'inquiry; knowledge acquired by investigation')[1] is the systematic study and the documentation of the human activity.[2][3] The time period of event before the invention of writing systems is considered prehistory.[4]