Boolean values are represented by the following literals (case insensitive):

It is actually encouraged to use the yes/no literals as they contribute towards the 'natural language flow' of the language.

Example:

.code linenumbers:{no}
  My code

A Boolean is returned by the following operator functions:

• .islower {a} {than}
• .isgreater {a} {than}
• .isequal {a} {to}