diff --git a/src/main/java/net/kemitix/conditional/Condition.java b/src/main/java/net/kemitix/conditional/Condition.java
index c8c2e9c..6213b62 100644
--- a/src/main/java/net/kemitix/conditional/Condition.java
+++ b/src/main/java/net/kemitix/conditional/Condition.java
@@ -29,7 +29,7 @@ package net.kemitix.conditional;
 public interface Condition {
 
     /**
-     * Create a new {@code Condition}.
+     * Create a new {@code Condition} for the clause.
      *
      * @param clause the condition to test
      *
@@ -42,6 +42,17 @@ public interface Condition {
         return new FalseCondition();
     }
 
+    /**
+     * Create a new {@code Condition} for the boolean opposite of the clause.
+     *
+     * @param clause the condition to test
+     *
+     * @return the Condition
+     */
+    static Condition whereNot(boolean clause) {
+        return where(!clause);
+    }
+
     /**
      * Logically AND combine the current {@code Condition} with the clause.
      *
@@ -51,6 +62,17 @@ public interface Condition {
      */
     Condition and(boolean clause);
 
+    /**
+     * Logically AND combine the current {@code Condition} with boolean opposite of the clause.
+     *
+     * @param clause the condition to test
+     *
+     * @return the Condition
+     */
+    default Condition andNot(boolean clause) {
+        return and(!clause);
+    }
+
     /**
      * Logically OR combine the current {@code Condition} with the clause.
      *
@@ -60,6 +82,17 @@ public interface Condition {
      */
     Condition or(boolean clause);
 
+    /**
+     * Logically OR combine the current {@code Condition} with the boolean opposite of the clause.
+     *
+     * @param clause the condition to test
+     *
+     * @return the Condition
+     */
+    default Condition orNot(boolean clause) {
+        return or(!clause);
+    }
+
     /**
      * Perform this response if the {@code Condition} is {@code true}.
      *
diff --git a/src/test/java/net/kemitix/conditional/ConditionalTest.java b/src/test/java/net/kemitix/conditional/ConditionalTest.java
index 9e21aaf..87209cc 100644
--- a/src/test/java/net/kemitix/conditional/ConditionalTest.java
+++ b/src/test/java/net/kemitix/conditional/ConditionalTest.java
@@ -115,6 +115,35 @@ public class ConditionalTest {
         thenTheOtherwiseResponseRuns();
     }
 
+    @Test
+    public void whereNotFalseThenRuns() {
+        //when
+        Condition.whereNot(false)
+                 .then(thenResponse);
+        //then
+        thenTheThenResponseRuns();
+    }
+
+    @Test
+    public void whereTrueAndNotFalseThenRuns() {
+        //when
+        Condition.where(true)
+                 .andNot(false)
+                 .then(thenResponse);
+        //then
+        thenTheThenResponseRuns();
+    }
+
+    @Test
+    public void whereFalseOrNotFalseThenRuns() {
+        //when
+        Condition.where(false)
+                 .orNot(false)
+                 .then(thenResponse);
+        //then
+        thenTheThenResponseRuns();
+    }
+
     private void whenOr(final boolean firstClause, final boolean secondClause) {
         Condition.where(firstClause)
                  .or(secondClause)