I am currently in an internship as an engineer working on a project. With me there is another intern, who has a creative job, let's call them J. We are expected to work together, each of us in our field to generate the best output.
My problem is, that I just can't figure out what is the right way to talk to J about technical issues. Sometimes it seems they know a lot about tech and stuff and I am impressed. Other times J asks questions that appear as if they have no knowledge whatsoever in that same field. When I try to explain everything I often feel this seems like I think J is stupid because they already know. But when I don't explain I am not sure if J understands.
My question is how can I develop a form of communication that makes sure everything is understood, but does not seem like teaching as this might seem arrogant? How can I find out what knowledge J has to make communication easier?