+(defvar *special-variable* nil
+ "*SPECIAL-VARIABLE*
+
+VALUE TYPE:
+
+ a generalized boolean
+
+INITIAL VALUE:
+
+ NIL
+
+DESCRIPTION:
+
+ It is special, and a boolean.
+
+ When true, it satisfies if coniditions. When NIL, it does not.
+ That may make it seem like it's not very special, but it is.
+
+EXAMPLES:
+
+ (let ((*special-variable* t)) (go)) => 'let-it-go")
+