diff --git a/roles/munin/tasks/main.yml b/roles/munin/tasks/main.yml
index 7aba3803d..9270e666d 100644
--- a/roles/munin/tasks/main.yml
+++ b/roles/munin/tasks/main.yml
@@ -1,10 +1,24 @@
-- assert:
-    that: munin_install is defined and munin_install is sameas true
-    success_msg: munin_install is defined and munin_install is sameas true
+# "How do i fail a task in Ansible if the variable contains a boolean value?
+# I want to perform input validation for Ansible playbooks"
+# https://stackoverflow.com/questions/46664127/how-do-i-fail-a-task-in-ansible-if-the-variable-contains-a-boolean-value-i-want/46667499#46667499
 
-- assert:
-    that: munin_enabled is defined and munin_enabled | type_debug == 'bool'
-    success_msg: munin_enabled is defined and munin_enabled | type_debug == 'bool'
+# If 0-init/tasks/validate_vars.yml has DEFINITELY been run (?) perhaps no need
+# to re-check whether vars are defined here.  As Ansible vars cannot be unset:
+# https://serverfault.com/questions/856729/how-to-destroy-delete-unset-a-variable-value-in-ansible
+
+- name: Assert that "munin_install is sameas true" (boolean not string etc)
+  assert:
+    that: munin_install is sameas true
+    quiet: yes
+    #that: munin_install is defined and munin_install is sameas true
+    #success_msg: munin_install is defined and munin_install is sameas true
+
+- name: Assert that "munin_enabled | type_debug == 'bool'" (boolean not string etc)
+  assert:
+    that: munin_enabled | type_debug == 'bool'
+    quiet: yes
+    #that: munin_enabled is defined and munin_enabled | type_debug == 'bool'
+    #success_msg: munin_enabled is defined and munin_enabled | type_debug == 'bool'
 
 - name: Install Munin if 'munin_installed' is not defined in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
   include_tasks: install.yml