diff --git a/easy-rules-core/src/main/java/org/jeasy/rules/api/Facts.java b/easy-rules-core/src/main/java/org/jeasy/rules/api/Facts.java
index 7759359..34fe182 100644
--- a/easy-rules-core/src/main/java/org/jeasy/rules/api/Facts.java
+++ b/easy-rules-core/src/main/java/org/jeasy/rules/api/Facts.java
@@ -95,12 +95,16 @@ public class Facts implements Iterable<Map.Entry<String, Object>> {
 
     @Override
     public String toString() {
-        StringBuilder stringBuilder = new StringBuilder("Facts {").append("\n");
-        for (Map.Entry<String, Object> fact : facts.entrySet()) {
-            stringBuilder.append(format("   Fact { %s : %s }", fact.getKey(), String.valueOf(fact.getValue())));
-            stringBuilder.append("\n");
+        StringBuilder stringBuilder = new StringBuilder("[");
+        List<Map.Entry<String, Object>> entries = new ArrayList<>(facts.entrySet());
+        for (int i = 0; i < entries.size(); i++) {
+            Map.Entry<String, Object> entry = entries.get(i);
+            stringBuilder.append(format(" { %s : %s } ", entry.getKey(), String.valueOf(entry.getValue())));
+            if (i < entries.size() - 1) {
+                stringBuilder.append(",");
+            }
         }
-        stringBuilder.append("}");
+        stringBuilder.append("]");
         return  stringBuilder.toString();
     }
 }
diff --git a/easy-rules-core/src/main/java/org/jeasy/rules/core/InferenceRulesEngine.java b/easy-rules-core/src/main/java/org/jeasy/rules/core/InferenceRulesEngine.java
index 00a23f3..dd22c59 100644
--- a/easy-rules-core/src/main/java/org/jeasy/rules/core/InferenceRulesEngine.java
+++ b/easy-rules-core/src/main/java/org/jeasy/rules/core/InferenceRulesEngine.java
@@ -105,12 +105,12 @@ public final class InferenceRulesEngine implements RulesEngine {
     public void fire(Rules rules, Facts facts) {
         Set<Rule> selectedRules;
         do {
-            LOGGER.info("Selecting candidate rules based on the following {}", facts);
+            LOGGER.info("Selecting candidate rules based on the following facts: {}", facts);
             selectedRules = selectCandidates(rules, facts);
             if(!selectedRules.isEmpty()) {
                 delegate.doFire(new Rules(selectedRules), facts);
             } else {
-                LOGGER.info("No candidate rules found for {}", facts);
+                LOGGER.info("No candidate rules found for facts: {}", facts);
             }
         } while (!selectedRules.isEmpty());
     }