[Rd] binary form of is() contradicts its unary form

[Suzen, Mehmet]

On 30 November 2017 at 16:30, Iñaki Úcar <i.ucar86 at gmail.com> wrote:
> If you really believe that references should be needed to know what to
> expect from a function call, then we work with different definitions

A behaviour of a function call might be quite complex depending on
the arguments characteristics,  it may not possible always to boil
down all possible behaviours of a function to a man page as in `?`,
and sometimes giving a reference to a larger exposition makes more
sense.