> FREE BEER is a beer which is free in the sense of freedom, not in the sense of free beer.
Now that is confusing!
Now you will also have to tell people that free software is free in the sense of freedom, and free in the sense of FREE BEER, and often but not necessarily in the sense of free beer.
It's a pun on a way to explain open source: Free as in freedom, not free as in free beer.