All you need to know...

is that it's possible.

Mike sent me a great story about an ultra-lightweight backpacker:

"Wolf was carrying a super-small pack which weighed 14 pounds including food and water. When asked how he got his pack weight so low, Wolf would reply, 'All you need to know is that it's possible.'"

One of the under-reported stories of the internet is this: it constantly reports on what's possible. Somewhere in the world, someone is doing something that you decided couldn't be done. By calling your bluff...