1 files changed, 2 insertions, 11 deletions
diff --git a/stdlib.pl b/stdlib.pl
index 7a744c4..4a62f87 100644
--- a/stdlib.pl
+++ b/stdlib.pl
@@ -1,3 +1,5 @@
+:- module(system, []).
+
 % Logic and control predicates
 \+ Goal :- call(Goal), !, fail.
 \+ Goal.
@@ -58,17 +60,6 @@ A @>= B :-
 A @>= B :-
 	A @> B.
 
-% List predicates
-
-length([], 0).
-length([_|Tail], Length) :-
-	length(Tail, Length0),
-	Length is Length0 + 1.
-
-member(X, [X|_]).
-member(X, [_|Tail]) :-
-	member(X, Tail).
-
 % Input output
 
 open(SourceSink, Mode, Stream) :-