diff --git a/src/attributes.js b/src/attributes.js
index a95e0c70b..0b9b06b31 100644
--- a/src/attributes.js
+++ b/src/attributes.js
@@ -354,7 +354,7 @@ jQuery.extend({
 
 				// Boolean attributes get special treatment (#10870)
 				if ( jQuery.expr.match.boolean.test( name ) ) {
-					// Set corresponding property to false for boolean attributes
+					// Set corresponding property to false
 					if ( getSetInput && getSetAttribute || !ruseDefault.test( name ) ) {
 						elem[ propName ] = false;
 					// Support: IE<9
diff --git a/src/traversing.js b/src/traversing.js
index 7cc70fb3a..6838cf223 100644
--- a/src/traversing.js
+++ b/src/traversing.js
@@ -255,23 +255,28 @@ jQuery.extend({
 function winnow( elements, qualifier, not ) {
 	if ( jQuery.isFunction( qualifier ) ) {
 		return jQuery.grep( elements, function( elem, i ) {
-			return qualifier.call( elem, i, elem ) ? !not : not;
+                        /* jshint -W018 */
+                        return !!qualifier.call( elem, i, elem ) !== not;
 		});
 
-	} else if ( qualifier.nodeType ) {
+	}
+
+	if ( qualifier.nodeType ) {
 		return jQuery.grep( elements, function( elem ) {
 			return ( elem === qualifier ) !== not;
 		});
 
-	} else if ( typeof qualifier === "string" ) {
-		if ( isSimple.test( qualifier ) ) {
-			return jQuery.filter( qualifier, elements, not );
-		} else {
-			qualifier = jQuery.filter( qualifier, elements );
-		}
 	}
 
-	return jQuery.grep(elements, function( elem ) {
+	if ( typeof qualifier === "string" ) {
+		if ( isSimple.test( qualifier ) ) {
+			return jQuery.filter( qualifier, elements, not );
+		}
+
+		qualifier = jQuery.filter( qualifier, elements );
+	}
+
+	return jQuery.grep( elements, function( elem ) {
 		return ( jQuery.inArray( elem, qualifier ) >= 0 ) !== not;
 	});
 }