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.
“If there are rules and regulations, I can't help it, I want to break them.”
“It's always a Catch-22 situation. They hate you if you're the same, and they hate you if you're different.”