 The writers of the license maintain it is free software, but the Free Software Foundation says it is not free because it infringes the so-called "zero freedom" of the GPL, that is, the freedom to use the software for any purpose.The SLUC license avoids military use by prohibiting the use of the software to military personnel and to personnel in industries creating offensive weapons.On the other hand, the SLUC license permits any other use of the software.