Subconscious communication

We think we communicate mostly with words. But the fact if we don't know exactly how much communication or information exchange is happening on the subconscious level. We understand so little about the brain, and consciousness that this question is unequivocally unanswered - exactly how much information exchange happen on the subconscious level.

I think it is far more than we think. The conscious brain is good at reasoning after the fact i.e. coming up with reasons why we think a certain way. And these reasons are not always right - they are just an attempt by the pre-frontal cortex to make sense of how we are feeling at the time.

e.g. you meet someone for the first time. There is a lot of information exchange happening. Just you looking at this person, there are processes in your brain forming an idea about this person - they way he looks, the way he walks, the way he moves, the way he smells, the way he talks, his facial expressions etc. etc. there are many other non-verbal data points. What he says is just one of the data points, albeit an important one. And let's say you don't really like this person - it could be a subconscious process telling you this, but because you don't have direct access to this process you typically attribute the reason for not liking him to something else - maybe something he said. But it is not what he said that really makes you dislike him, it is actually something else. This happens routinely and can even influence one's own conscious ideas. i.e. say you meet a person who says he is crazy about apples, he loves them so much. now you don't like this person due to a subconscious process telling you that. You pre-frontal cortex wants a reason so it makes one up - I don't like him, he likes apples and I am actually indifferent towards apples. But if I don't like him, and he loves apples, then maybe I don't like apples that much, maybe I hate them. So it might tilt your indifference to apples to slight hate of apples. 

So there is a feedback loop here which actually changes you thinking. Your subconscious makes you feel a certain way about something - your pre frontal cortex tries to make sense of it by rationalizing it - and this process of rationalization changes your ideas about that thing. How interesting.