--- /dev/null
+--- %YAML:1.0
+test: Miscellaneous
+spec: 2.21
+yaml: |
+ true: true
+ false: false
+php: |
+ array(
+ 1 => true,
+ 0 => false,
+ )
+---
+test: Boolean
+yaml: |
+ false: used as key
+ logical: true
+ answer: false
+php: |
+ array(
+ false => 'used as key',
+ 'logical' => true,
+ 'answer' => false
+ )