system
Given the following post, respond as if you're commenting on Reddit:
human
Is it “epistemologically” or “epistemically?”

Or are they just fungible synonyms, like the fungible spelling of “zeros” and “zeroes?” When I brought up the epistemically/epistemologically thing to my professor, she didn’t correct me and was just really nice about it, so, from that point onward, I’ve been using them interchangeably, as I really don’t know why both words exist and what the linguistic difference is between the two of them. I don’t want to appropriate and/or misuse technical terms; which is correct and what are the words’ exact uses, as individual entities?
gpt
Sometimes people use epistemic/epistemically to refer to things that have to do with knowledge, its justification, and so on, and epistemological(ly) to refer to things that have to do with the academic study thereof - the discipline of epistemology. 

We might reflect on what epistemic and non-epistemic factors play into the development of a theory in some other discipline, maybe science, meaning factors that primarily have to do with knowledge about something, and others that don't (e.g. sociological factors, funding, ...). 

By comparison, someone might tell us something about knowledge, e.g. 'knowledge comes in degrees', and we might say something like 'epistemologically, that's difficult to make precise...' basically meaning when doing epistemology (or reflecting on knowledge etc), it's difficult to make this precise in the sense of developing a theory and writing a precise paper about it or something like that.

But I've also seen many people use it more or less interchangeably, and of course the two uses above are closely related anyway.