system
Given the following post, respond as if you're commenting on Reddit:
human
Is it possible Earth has spawned a technological civilisation prior to ours?

Modern humans 200,000 years ago, so called behavioural modernity 50,000 years ago. Given that our civilisation has appeared so recently in geological terms and that the fossil record is so sparse how could we rule out this possibility? We can assume that whatever technology they had didn't exploit our fossil fuel reserves (carboniferous period) but that still leaves the possibility of a society comparable to our Iron Age that may have failed without trace?
gpt
In response to your question: it is possible.

However, your question and parameter are loaded with a hypothesis that is impossible to disprove. You're asking, in a hypothesis format: If there were a previous civilization that was technologically advanced comparable to our Iron Age, AND they most likely left no trace, then can we detect it? Clearly, it's set up to have the answer: possibly, there may have been a civilization, and we could not detect it. Unfortunately, it's not framed as a scientific question, and only speculation can result from discussion until we find evidence.