system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a way for us to know what the population of any given species of dinosaur was during their time on earth? And if so, how?
gpt
Certainly not.  In a field where we aren't sure what are separate species, there is little chance of being able to make such precise observations.

We can estimate that X dinosaur was more numerous than Y dinosaur for a given period, but anything more would be too poorly supported.