You're conflating 3 different things here: how methods are selected,
how R treats missing arguments, and how the standardGeneric() call is
implemented.
Maybe more relevant, if this question is motivated by a practical need,
you may want to rethink what the generic function does. "Nonstandard"
i believe the following is true but would appreciate confirmation
that it is intended behavior and will continue:
if a default argument is employed in the definition of a generic
function, and the generic is called with the argument in question
(call it 'ARG') missing, then the method for si
