Don't make me think

The best way to tire somebody intellectually is to stretch their mind to make them actually think. And "think", i don't mean talk some scientific of philosophical stuff, I mean to talk about something that makes you change your mind, that makes you reinspect all your thinking and the topic here is not really important. You can talk about politics, philosophy, psychology, air, friends girlfriends dog, fashion or your new shoes, topic is really irrelevant as long as it can keep you in your comfort zone as long as it does not question sometimes things, that you would consider the most fundamental beliefs of yours, because seeing is believing and doesn't matter how sure are you bout such "fundamental" beliefs it's just beliefs. For instance you can argue that freedom and tolerance are most fundamental values of any modern society, but than paradox of tolerance and real facts about actual order in this society may lead you to conclusion, that we are "forced to be free" or you may think that you friends sister is a slut, and feel kind of superior to her in the sense of morality for instance, but than you may feel uncomfortable if somebody would proof you wrong, because in both cases that would create a cognitive dissonance and that is what makes you think specially when you reason and do not rationalize. That is hard that makes think and that in my opinion is the major difference between small talk and hard conversations.