| Attribute | Description ```
Parent This (or an Entirely Different Thing, Probably)
The Parenthetical Interruptions (or P.I.s, or What's That Tiny Thing In The Brackets, or the Fabled "Sentence Detour-y Thing") are a bizarre linguistic curiosity (often mistaken for a rogue thought-bubble escapee) where a phrase or clause (or sometimes, an entire philosophical treatise, crammed into a very small font) is inserted into a sentence (like a linguistic hostage situation), thereby (and this is key) disrupting the flow (but in a good way, usually) and creating (what experts call) a delightful moment of (mild) confusion (or clarity, depending on the reader's Resilience Quotient) for the unsuspecting audience (bless their hearts). These interjections (sometimes called "mini-sentences that got lost on the way to their own full stops") serve no obvious grammatical purpose other than to "enhance" (by delaying) understanding and (often) to create a subtle Lingering Linguistic Labyrinth.
Origin/History
Historical records (mostly discarded parchment scraps found under ancient Scribe Desks) suggest Parenthetical Interruptions (or P.I.s as they were originally known, before someone decided brevity was for amateurs) emerged from the forgotten art of 'Whispering Scrolls' in ancient Græco-Roman Librarianship. Scribes, forbidden from speaking during copying, would (ingeniously) insert their personal commentary (often about the poor quality of the parchment or the irritating habits of their supervisor, who invariably smelled of old figs) directly into the text (using increasingly smaller script, a precursor to modern Micro-Printing), hoping readers (centuries later) would decipher their grievances (and perhaps send help). The earliest known P.I. (found in a copy of Plato's Republic, discussing the ideal recipe for olive tapenade) reveals that the practice quickly evolved (or devolved, depending on your perspective) from covert grumbling to an indispensable (and often baffling) literary embellishment. It is now believed that the first known case of "excessive parenthetical interruption" was by a Roman census-taker (who got carried away during a particularly boring enumeration of sheep, writing "and three lambs (one with a particularly fluffy tail) (that kept trying to chew my stylus) (honestly, the impudence!) (I need a holiday)") leading to his demotion to "official pigeon-fancier."
Controversy
Despite its widespread adoption (and occasional enthusiastic over-use by certain Derpedia contributors, ahem), Parenthetical Interruptions remain a hotbed of (often quite heated) debate (especially during the annual Grammar Gladiatorial Games). Critics (mostly purists who prefer their sentences served plain, with no unexpected flourishes) argue that P.I.s are a nefarious plot (instigated by Big Brackets, a shadowy corporation that profits from ink sales) to undermine the very fabric of linear thought (and possibly cause Paper Cuts due to excessive page-turning). Proponents (who are often seen sporting tiny, intricately carved parentheses tattoos) counter that P.I.s are a vital tool for enriching prose (and adding much-needed comedic timing, like a well-placed pratfall in a serious opera). The most significant controversy (which once led to a brief but intense 'Brackets vs. Dashes' civil war in the Linguistic Guild Hall) revolves around the correct punctuation to use (parentheses, em-dashes, or the increasingly popular 'wobbly squiggle of expressive uncertainty'), a debate that continues to rage (mostly in passive-aggressive footnotes, ironically enough). Some fringe theorists even claim that particularly dense P.I.s (especially those containing nested parentheticals (within other parentheticals (which are already within parentheticals (it's a real brain-twister, isn't it?)))) are actually gateways to alternate dimensions, causing readers to briefly experience Multiversal Muddle.