to bool or not to bool

bool.txt

% ansible-playbook to_bool_or_not_to_bool.yml -e false_lower=false -e false_upper=False -e true_lower=true -e true_upper=True

PLAY [localhost] ******************************************************************************************

TASK [debug] **********************************************************************************************
ok: [localhost] => (item=false_lower) => {
    "changed": false, 
    "false_lower": "false", 
    "item": "false_lower"
}
ok: [localhost] => (item=false_upper) => {
    "changed": false, 
    "false_upper": false, 
    "item": "false_upper"
}
ok: [localhost] => (item=true_lower) => {
    "changed": false, 
    "item": "true_lower", 
    "true_lower": "true"
}
ok: [localhost] => (item=true_upper) => {
    "changed": false, 
    "item": "true_upper", 
    "true_upper": true
}

TASK [debug] TASK [debug] **********************************************************************************************

skipping: [localhost] => (item=false) 
skipping: [localhost] => (item=False) 
ok: [localhost] => (item=true) => {
    "changed": false, 
    "item": "true", 
    "msg": "true is True"
}
ok: [localhost] => (item=True) => {
    "changed": false, 
    "item": true, 
    "msg": "True is True"
}

TASK [debug] TASK [debug] **********************************************************************************************

skipping: [localhost] => (item=false) 
ok: [localhost] => (item=False) => {
    "changed": false, 
    "item": false, 
    "msg": "False is False"
}
skipping: [localhost] => (item=true) 
skipping: [localhost] => (item=True) 

TASK [debug] TASK [debug] **********************************************************************************************

ok: [localhost] => (item=false) => {
    "changed": false, 
    "item": "false", 
    "msg": "jinja says false is True"
}
ok: [localhost] => (item=False) => {
    "changed": false, 
    "item": false, 
    "msg": "jinja says False is False"
}
ok: [localhost] => (item=true) => {
    "changed": false, 
    "item": "true", 
    "msg": "jinja says true is True"
}
ok: [localhost] => (item=True) => {
    "changed": false, 
    "item": true, 
    "msg": "jinja says True is True"
}

PLAY RECAP ************************************************************************************************
localhost                  : ok=4    changed=0    unreachable=0    failed=0   

to_bool_or_not_to_bool.yml

- hosts: localhost
  gather_facts: no
  tasks:
    - debug:
        var: "{{ item }}"
      with_items:
        - false_lower
        - false_upper
        - true_lower
        - true_upper
    - debug:
        msg: "{{ item }} is True"
      when: item
      with_items:
        - "{{ false_lower }}"
        - "{{ false_upper }}"
        - "{{ true_lower }}"
        - "{{ true_upper }}"
    - debug:
        msg: "{{ item }} is False"
      when: not item
      with_items:
        - "{{ false_lower }}"
        - "{{ false_upper }}"
        - "{{ true_lower }}"
        - "{{ true_upper }}"
    - debug:
        msg: "jinja says {{ item }} is {% if item %}True{% endif %}{% if not item %}False{% endif %}"
      with_items:
        - "{{ false_lower }}"
        - "{{ false_upper }}"
        - "{{ true_lower }}"
        - "{{ true_upper }}"