The Free Software Foundation defines the traits of Free Software as having 4 freedoms (not rights) and explains them in simple language at <a href="http://www.gnu.org/philosophy/free-sw.html" rel="nofollow">http://www.gnu.org/philosophy/free-sw.html</a>.<p>The freedoms are enforced by the GPL, just like any other EULA. So, trying to question why there are only "4" principles, is missing the point. The GPL itself has several terms and conditions.<p>So, equating the 4 freedoms to the notion similar to the "religious 10 commandments" and then invoking the argument of "dogma" seems disingenuous.