Westcoast, while you don’t want to get into religious discussions, if a not-frum Jew asks a serious question, it can be an opportunity to do some kiruv. If you don’t know an answer, Aish HaTorah recomends: Great question! I don’t know that answer but I can find out.
Your ruchnius is the main concern, but be aware that you are probably being watched so make sure to carry yourself in a way that will make a kidush Hashem.