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.

I like how libertarians view the world as this magically self-correcting system. The environment is the most obvious example: if a company pollutes too much, people will boycott their product, or their factories will close because the environment's too hostile! Back in the real world, there are no mass boycotts, and all the people dying of cancer downstream doesn't really affect the operation of the factory.

The real reason libertarianism is infallible, though, is that its definition can be changed as soon as someone challenges it. Let's face it, though, libertarians all want a few of the same things: no more EPA, no more FDA, no more Social Security (which wouldn't really matter since nobody would live over 65 in such a place anyways), across-the-board deregulation (so you can buy a car at a 70% interest rate to drive on a toll road) and regressive taxation. There's nowhere to hide, libertarians. Your philosophy is shit and we all know it.