diff --git a/session/session1.ql b/session/session1.ql
index 02be83e..0199245 100644
--- a/session/session1.ql
+++ b/session/session1.ql
@@ -44,17 +44,10 @@ predicate setValueTaintStep(DataFlow::Node pred, DataFlow::Node succ) {
     // 1. without sanitizer
     gr.getASuccessor+() = postgr and
     succ.asExpr() = postgr
-    //
-    // 2. with recursive predicate, no sanitizer
-    // recursiveSuccessor(gr, postgr) and
-    // succ.asExpr() = postgr
-    // 3. with recursive predicate, with sanitizer
-    // sanitizerCheckedSuccessor(gr, postgr) and
-    // succ.asExpr() = postgr
   )
 }
 
-// Def-Use special handling:
+// Def-Use special handling.  Not needed here, but a good example of recursive predicates.
 // - Include sanitizer check when flagging successive object member calls in taint
 //   step.
 // - Stop at
@@ -153,7 +146,6 @@ class CanWriteGuard extends TaintTracking::SanitizerGuardNode, DataFlow::CallNod
     // outcome is the result of the conditional (the true or false branch)
     outcome = true and
     e = this.getReceiver().asExpr()
-    // or e.getASuccessor+() = this.getReceiver().asExpr()
   }
 }
 
diff --git a/source/sample-utility-0.js b/source/sample-utility-0.js
index 0029e89..166e2d4 100644
--- a/source/sample-utility-0.js
+++ b/source/sample-utility-0.js
@@ -1,30 +1,46 @@
-var SampleUtility = function(){};
+var SampleUtility = function () { };
 SampleUtility.prototype = Object.extendsObject(Processor, {
-    
-    setUserStatus: function() {
+
+    setUserStatus: function () {
         var value = this.getParameter('value');
 
         var ua = new GR('users');
         ua.query();
-        
-        if(!ua.hasNext()){
+
+        if (!ua.hasNext()) {
             ua.initialize();
-            ua.setValue('status',value);
+            ua.setValue('status', value);
             ua.insert();
         }
         else {
             ua.next();
-            ua.setValue('status',value); // unsafe
+            ua.setValue('status', value); // unsafe
             ua.update();
             // Nested if() test.
             if (ua.safeToWrite()) {
                 ua.setValue('status', value); // safe
                 ua.update();
-            }        
+            }
         }
 
+        if (ua !== null) {
+            1
+        } else {
+            if (ua.safeToWrite()) {
+                ua.setValue('status', value);
+                ua.update();
+            }
+        }
 
+        if (ua == magicval) {
+            1
+        } else {
+            if (ua.safeToWrite()) {
+                ua.setValue('status', value);
+                ua.update();
+            }
+        }
     },
-    
+
     type: 'SampleUtility'
 });