What I think is that everything is feedback.
We continuously react and adapt to context. And in the context of people we can enter in a more active or passive way.
As we cannot “not to communicate”, people react and adapt to our communication: being able to notice it or not, being able use the language to explore and stimulate people’s feedback … is another story. And it is a veeeery interesting story 🙂
Have you ever heard of NLP? Everything is feedback: a definition of NLP.