diff --git a/basis/generalizations/generalizations-docs.factor b/basis/generalizations/generalizations-docs.factor
index a676be3be8..912f69587e 100644
--- a/basis/generalizations/generalizations-docs.factor
+++ b/basis/generalizations/generalizations-docs.factor
@@ -139,15 +139,6 @@ HELP: -nrot
     }
 } ;
 
-HELP: nrev
-{ $values { "n" integer } }
-{ $description "A generalization of " { $link spin } " that reverses any number of items at the top of the stack."
-}
-{ $examples
-  { $example "USING: prettyprint generalizations ;" "1 2 3 4 4 nrev .s" "4\n3\n2\n1" }
-  "The " { $link spin } " word is equivalent to " { $snippet "3 nrev" } "."
-} ;
-
 HELP: ndip
 { $values { "quot" quotation } { "n" integer } }
 { $description "A generalization of " { $link dip } " that can work " 
@@ -327,7 +318,6 @@ $nl
 { $subsection nnip }
 { $subsection ndrop }
 { $subsection ntuck }
-{ $subsection nrev }
 { $subsection mnswap }
 "Generalized combinators:"
 { $subsection ndip }
diff --git a/basis/generalizations/generalizations.factor b/basis/generalizations/generalizations.factor
index c6a17df099..4692fd20db 100644
--- a/basis/generalizations/generalizations.factor
+++ b/basis/generalizations/generalizations.factor
@@ -1,8 +1,8 @@
 ! Copyright (C) 2007, 2008 Chris Double, Doug Coleman, Eduardo
 ! Cavazos, Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel sequences sequences.private math math.ranges
-combinators macros quotations fry macros locals ;
+USING: kernel sequences sequences.private math combinators
+macros quotations fry ;
 IN: generalizations
 
 <<
@@ -51,9 +51,6 @@ MACRO: nnip ( n -- )
 MACRO: ntuck ( n -- )
     2 + '[ dup _ -nrot ] ;
 
-MACRO: nrev ( n -- )
-    1 [a,b] [ ] [ '[ @ _ -nrot ] ] reduce ;
-
 MACRO: ndip ( quot n -- )
     [ '[ _ dip ] ] times ;
 
diff --git a/basis/memoize/memoize.factor b/basis/memoize/memoize.factor
index 1c31156311..7b8c30c534 100644
--- a/basis/memoize/memoize.factor
+++ b/basis/memoize/memoize.factor
@@ -35,7 +35,7 @@ M: too-many-arguments summary
     drop "There must be no more than 4 input and 4 output arguments" ;
 
 : check-memoized ( word -- )
-    dup #in 4 > swap #out 4 > or [ too-many-arguments ] when ;
+    [ #in ] [ #out ] bi [ 4 > ] either? [ too-many-arguments ] when ;
 
 : define-memoized ( word quot -- )
     over check-memoized