I think its a very deeply interfaced experience that each brain experiences interdependent of every other brain. Then when these brains meet and feel the presence of the other we project outward varying forms of language (dress, speech, body language etc) in order to achieve a level of understanding of the other entity whatever it is.

Any form of that communication facilities a response of some sort to the inital action itself. So as were exchanging that communication whatever it was we decide for ourselves if communication or continued interaction with said thing is worth the effort of continuing doing so.

Alas at the same exact time such interactions you're speaking of in general ( trying to convince others of your worldview) is a way each individual battle tests its own worldview by epoxing its ideal world to others and seeing the haptic feesback it receives from others about how they feel/think/respond to said ideas. As when collect that information our said environment can form our thinking.