True, False, and None are provided so that seaborn Python code pasted
into R (e.g. histplot(data = df, x = "a", kde = True)) runs unchanged.
They are exactly TRUE, FALSE, and NULL.
Value
These objects are exported constants, not functions. Referencing one yields
its stored value: True is the length-one logical vector TRUE, False is
the length-one logical vector FALSE, and None is NULL. They exist only
so that seaborn code containing Python's True, False, and None literals
evaluates in R unchanged.