Its a tough question to ask and I am looking for a scientific answer. How can we talk in our mind? I mean when we think about something it feels as if we are talking in our head. They are multiple arguments going on in our head and you can listen to it. What is it? This question arose when I was thinking how differently computers and humans process inputs? Computers just look at the input and give out the output accordingly(the way they have been programmed) I supposed that humans behaved the same way. There is a certain stimulus and we behave accordingly. But we "understand" what is happening while a computer does not. What is this understanding? I hope someone gets and gives me some answer. I don't even know if my question makes sense!