When the voices in my head are the voices of people I know, I should ask them how old they are. That way I could ask them in real life and know if the voices are right. For me it means the difference between whether I’m actually “thought-calling”/”mental-calling” (experiencing telepathy) or not.
Updated on 7-2-18: Changed the perspective from second person to first person in several sentences. I’m trying to avoid any legal trouble or any other kind of trouble that may arise by appearing to give medical advice.