more stipulations re: lisp similarities

readme.txt

@@ -25,7 +25,8 @@ there are also pre-processor macros:
 - :<misc>, for adding comments (lines removed in pre-processing)
 you may notice that the language looks like a lisp/scheme and the preprocessor keywords
 are similar to m4/cpp. I'm a fan of homoiconicity, and this provides both a familiar and
-delightfully simple syntax.
+delightfully simple syntax. note that it doesn't actually function like a lisp under the
+hood: there's no cons, for instance. no church numerals either, so it isn't pure(tm).
 
 examples: