diff --git a/src/main/java/org/biscuitsec/biscuit/datalog/SymbolTable.java b/src/main/java/org/biscuitsec/biscuit/datalog/SymbolTable.java
index 94e6a499..489dae2f 100644
--- a/src/main/java/org/biscuitsec/biscuit/datalog/SymbolTable.java
+++ b/src/main/java/org/biscuitsec/biscuit/datalog/SymbolTable.java
@@ -177,7 +177,7 @@ public String print_scope(final Scope scope) {
             case PublicKey:
                 Option<PublicKey> pk = this.get_pk((int) scope.publicKey);
                 if(pk.isDefined()) {
-                    return pk.toString();
+                    return pk.get().toString();
                 }
         }
         return "?";
diff --git a/src/main/java/org/biscuitsec/biscuit/datalog/expressions/Op.java b/src/main/java/org/biscuitsec/biscuit/datalog/expressions/Op.java
index 62b2c99d..dfdcfe27 100644
--- a/src/main/java/org/biscuitsec/biscuit/datalog/expressions/Op.java
+++ b/src/main/java/org/biscuitsec/biscuit/datalog/expressions/Op.java
@@ -157,7 +157,7 @@ public String print(Deque<String> stack, SymbolTable symbols) {
             String _s = "";
             switch (this.op) {
                 case Negate:
-                    _s = "! " + prec;
+                    _s = "!" + prec;
                     stack.push(_s);
                     break;
                 case Parens:
diff --git a/src/main/java/org/biscuitsec/biscuit/token/Authorizer.java b/src/main/java/org/biscuitsec/biscuit/token/Authorizer.java
index 0d2d3618..9462c8d3 100644
--- a/src/main/java/org/biscuitsec/biscuit/token/Authorizer.java
+++ b/src/main/java/org/biscuitsec/biscuit/token/Authorizer.java
@@ -631,15 +631,11 @@ public String print_world() {
     }
 
     public FactSet facts() {
-        return this.world.facts();/*.stream()
-                .map((f) -> org.biscuitsec.biscuit.token.builder.Fact.convert_from(f, this.symbols))
-                .collect(Collectors.toList());*/
+        return this.world.facts();
     }
 
     public RuleSet rules() {
-        return this.world.rules();/*.stream()
-                .map((r) -> org.biscuitsec.biscuit.token.builder.Rule.convert_from(r, this.symbols))
-                .collect(Collectors.toList());*/
+        return this.world.rules();
     }
 
     public List<Tuple2<Long, List<Check>>> checks() {
diff --git a/src/test/java/org/biscuitsec/biscuit/token/SamplesTest.java b/src/test/java/org/biscuitsec/biscuit/token/SamplesTest.java
index 8fb90775..0ae50204 100644
--- a/src/test/java/org/biscuitsec/biscuit/token/SamplesTest.java
+++ b/src/test/java/org/biscuitsec/biscuit/token/SamplesTest.java
@@ -92,20 +92,18 @@ DynamicTest process_testcase(final TestCase testCase, final PublicKey publicKey,
                             world.fixOrigin();
                             System.out.println("fixed origin");
 
-
                             World authorizerWorld = new World(authorizer);
 
-
                             System.out.println("validation world"+world);
                             System.out.println("authorizer world"+authorizerWorld);
 
                             assertEquals(world.factMap(), authorizerWorld.factMap());
 
-                            /*assertEquals(world.rules.size(), authorizerWorld.rules.size());
+                            assertEquals(world.rules.size(), authorizerWorld.rules.size());
                             for (int i = 0; i < world.rules.size(); i++) {
                                 assertEquals(world.rules.get(i), authorizerWorld.rules.get(i));
                             }
-                            assertEquals(world.checks.size(), authorizerWorld.checks.size());
+                            /*assertEquals(world.checks.size(), authorizerWorld.checks.size());
                             for (int i = 0; i < world.checks.size(); i++) {
                                 assertEquals(world.checks.get(i), authorizerWorld.checks.get(i));
                             }
@@ -129,12 +127,15 @@ DynamicTest process_testcase(final TestCase testCase, final PublicKey publicKey,
                             System.out.println(world.facts);
                             System.out.println(authorizerWorld.facts);
                             assertEquals(world.factMap(), authorizerWorld.factMap());
-                            
-                            /*assertEquals(world.rules.size(), authorizerWorld.rules.size());
+
+                            System.out.println(world.rules);
+                            System.out.println(authorizerWorld.rules);
+
+                            assertEquals(world.rules.size(), authorizerWorld.rules.size());
                             for (int i = 0; i < world.rules.size(); i++) {
                                 assertEquals(world.rules.get(i), authorizerWorld.rules.get(i));
                             }
-                            assertEquals(world.checks.size(), authorizerWorld.checks.size());
+                            /*assertEquals(world.checks.size(), authorizerWorld.checks.size());
                             for (int i = 0; i < world.checks.size(); i++) {
                                 assertEquals(world.checks.get(i), authorizerWorld.checks.get(i));
                             }
@@ -381,6 +382,7 @@ public void fixOrigin() {
                     this.origin.set(i, Long.MAX_VALUE);
                 }
             }
+            Collections.sort(this.origin);
 
             System.out.println("->: "+this.origin);
 
@@ -434,6 +436,32 @@ public int compareTo(RuleSet ruleSet) {
                 return this.origin.compareTo(ruleSet.origin);
             }
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+
+            RuleSet ruleSet = (RuleSet) o;
+
+            if (!Objects.equals(origin, ruleSet.origin)) return false;
+            return Objects.equals(rules, ruleSet.rules);
+        }
+
+        @Override
+        public int hashCode() {
+            int result = origin != null ? origin.hashCode() : 0;
+            result = 31 * result + (rules != null ? rules.hashCode() : 0);
+            return result;
+        }
+
+        @Override
+        public String toString() {
+            return "RuleSet{" +
+                    "origin=" + origin +
+                    ", rules=" + rules +
+                    '}';
+        }
     }
 
     class CheckSet implements Comparable<RuleSet> {
@@ -462,6 +490,14 @@ public int compareTo(RuleSet ruleSet) {
                 return this.origin.compareTo(ruleSet.origin);
             }
         }
+
+        @Override
+        public String toString() {
+            return "CheckSet{" +
+                    "origin=" + origin +
+                    ", checks=" + checks +
+                    '}';
+        }
     }
 
 }