Why is libertarianism so infallible?

It is due to it being the application of political science. It does not permit failed policies to be continued fruitlessly year after year with idealistic fervour, it is next to impossible for anyone surrounded by fierce libertarian critics to continue clinging on to lies. It is a purely functional machine, lubricated with justice and fueled by free speech.

Don't talk about libertarianism, you're a schmuck. I'm a libertarian, and I refuse to associate myself with you. You're spending more time being intellectual than you are being intelligent, and you fail horribly at even that.

Libertarianism is infallible because it accepts all of its flaws. Libertarians are aware that no system is perfect, but that government sure as hell never solved any of those problems. It also bases itself in principle rather than power. It is based in the only correct principles as it is the only political ideology that does not call to tell other people how they have to live their lives, it is based entirely on every individual's liberties and desire.