I suppose I could ask the same of humans. How do you know a human things and feels the same way you do and that you aren't just projecting your own feelings on

I suppose I could ask the same of humans. How do you know a human things and feels the same way you do and that you aren't just projecting your own feelings onto their actions? I'm not trying to be glib. I think it is actually a difficult question to answer (and I have misunderstood other people's feelings many, many times!).