what i like to do is getting into conversations with almost everyone that wanna talk. Then if i see that i am wrong i will simply admit it, the things that i lose by admitting that i am wrong are far less than those i earn. I am correct i will try with arguments to make the other person understand the essence of the argument without being aggressive.

If he/she gets it then at least we have a logical person that we can make many talks and become friends. If they don't wanna admit they are wrong, i simply move forward, try to avoid them and never let them get into my inner circle of people. I won't let them think they won though :P i wanna make it clear that we disagree :P