system
Given the following post, respond as if you're commenting on Reddit:
human
Assuming all life on Earth descended from a common ancestor that existed almost 4 billion years ago, what generation are we, approximately?
gpt
There is probably no sensible answer to the question, because the very earliest life may not have had discrete generations - it may have just been chains of molecules that broke off and replicated that way, with no clear cutoff between that and discrete generations. In fact there probably isn't going to be a clear cut-off between "living" and "non-living".

A better question might be starting from the first single-celled life. Seeing as the first single-celled life may have replicated very quickly, the answer is going to be a very big number.