Penn Jillette also believes global warming is a conspiracy. No nation with free market health insurance has universal healthcare, so as the person making an extraordinary claim, it's on you to come up with proof.
Ummm, no he doesn't? This was something he believed in the past but has since changed his mind about.
Still, I think replying to someone's quoting Penn with the equivalent of "well he denies climate change, so why would we listen to him?" is pretty pointless for a debate, especially when what you say is wrong! We might as well throw out the ability to quote anyone, since basically everyone has some view that someone disagrees with.