system
Given the following post, respond as if you're commenting on Reddit:
human
Before humans learned to shave did primitive men all have long beards?

Along with that is the question about hair and fingernails. If we don't cut them they grow to long unwieldy lengths. How did primitive humans deal with this?
gpt
Interesting question, but we have next to no data to support to discuss in this case. Without hard data, we leave the land of science for the pastures of speculation...

Beards don't fossilise. We have a few petroglyphs showing our ancestors. Beards do not feature promintly in them; is it because they had none or artistic license? Who can say?