We need a strong police force - the Interior Ministry of the Republic of Chechnya. We have to get rid of the traitors who have managed to penetrate into the law-enforcement department.
I'm horrified to admit that I just love Salinger. I was devastated to find out that other people feel the same way.
What convinces is conviction. Believe in the argument you're advancing. If you don't you're as good as dead. The other person will sense that something isn't there, and no chain of reasoning, no matter how logical or elegant or brilliant, will win your case for you.