Boolean predicates

Reference documentation for Expressif predicates in the boolean scope.

Name	Overview
`and`	Returns the logical conjunction of the Boolean-converted input and a secondary predicate expression. Null-like and unconvertible values convert to `false`; zero converts to `false`; nonzero numbers and recognized true text convert to `true`. Evaluates the secondary expression only when the converted input is `true`.
`is-false`	Returns `true` if the argument is effectively `false` else return `false`.
`is-false-or-null`	Returns `true` if the argument is effectively `false` or `null` else return `false`.
`is-identical-to`	Returns `true` if the boolean passed as argument has the same value than the boolean passed as parameter. Returns `false` otherwise.
`is-true`	Returns `true` if the argument is effectively `true` else return `false`.
`is-true-or-null`	Returns `true` if the argument is effectively `true` or `null` else return `false`.
`not`	Returns the logical negation of the Boolean-converted input. Null-like and unconvertible values convert to `false`; zero converts to `false`; nonzero numbers and recognized true text convert to `true`.
`or`	Returns the logical disjunction of the Boolean-converted input and a secondary predicate expression. Null-like and unconvertible values convert to `false`; zero converts to `false`; nonzero numbers and recognized true text convert to `true`. Evaluates the secondary expression only when the converted input is `false`.
`xor`	Returns `true` when exactly one of the Boolean-converted input and a secondary predicate expression evaluates to `true`. Null-like and unconvertible values convert to `false`; zero converts to `false`; nonzero numbers and recognized true text convert to `true`. Always evaluates the secondary expression.