++ Thanks for the runtime examples, AnomalousMonk.

"Dunno about the documentation."

After much delving in that musty library beneath the lower catacombs, I believe I may have found an ancient scroll of particular relevance:

$ perldoc perlglossary
...
    dwimmer
        DWIM is an acronym for “Do What I Mean”, the principle that something
        should just do what you want it to do without an undue amount of fuss.
        A bit of code that does “dwimming” is a “dwimmer”. Dwimming can
        require a great deal of behind-the-scenes magic, which (if it doesn’t
        stay properly behind the scenes) is called a dweomer instead.
...

Perhaps, to avoid this dwimmer becoming a dweomer, we should stop poking it. :-)