What kind of truths are we talking about here? The truth that Sandy Berger accidently shoved a bunch of papers in his pants? The truth that the best way to help the economy is to raise taxes and give people less money? The truth that every time someone fails, does something bad, or gets something wrong it was all someone elses fault or a "right wing conspiracy"? The truth in movies by Al Gore and Michael Moore?
Show me some truth and maybe you'll persuade me. Keep telling lies, making excuses, and blaming someone else for your faults and you'll get nowhere.