Boolean
A binary value: either true or false. These values are case sensitive. If no default value is specified, a Boolean type defaults to a value of false.
In the Tinderbox UI, Boolean attributes my often be represented as tick-boxes. A ticked box equates to true, and and empty box to false.
When coercing a Boolean value—such as an expression result—to Number-type of data, true coerces to 1 and false coerces to 0 (zero).
When displayed in a note's displayed attributes table, Boolean-type attributes show tick-box instead of the attribute value.: un-ticked represents 'false' (the type default) and ticked 'true'.