Attempts to resolve the Quandary:
9
After working through the night to winnow out lingering typos from her chef-d'oeuvre, she realized caffeine would not be a sufficient roborant and called a dear friend who was something of a flaneur in the hopes that his international peregrinations had at least left him with a good recipe for a sure-fire (and mostly legal) pick-me-up. (by LSnowe)
8
Yosemite found a roborant tonic in John Muir, the young flaneur, who meandered through the Sierra mountain range endlessly, winnowing 'hoofed locusts' (his nickname for domestic sheep) and profit-oriented 'harmful do-gooders' off Yosemite through his activism, founding, in the process, his chef-d'oeuvre, the Sierra Club. (by QuaQua)
7
If writing a personal ad is an act of winnowing one's self down to a few words, the first ad submitted to the London Review of Books in 1998 -- by a "disaffiliated flaneur" who was "sliding towards pathos" but roborated by Viagra -- must stand as the chef-d'oeuvre of the form. (by Rudi)
6
Another pointless morning, countless days into the media fuss over his one and only chef-d'oeuvre, he spotted two roborant words in the Classifieds that rescued him from the morass of notoriety: "Flaneurs Wanted," the ad read, "Explore the landscape of your choice, physical or otherwise, at your pace, on your terms, with our implanted, patent-pending Human Condition Aggregator (HCA) that will winnow from your experiences (and those of other networked testers) the beta version of the Human Condition Genome (TM)." (by aslam)
5
Winnowing his life story to its essence, the flaneur said that wandering was his roborant and a tattered diary of his travels was his chef-d'oeuvre. (by Rudi)
4
THE FLANEUR: A STROLL THROUGH THE PARADOXES OF PARIS, while perhaps not Edmund White's chef d'oeuvre, is nevertheless idiosyncratically engaging and probably particularly roborant for anyone interested in winnowing from his experience any traces of heterosexuality. (by cusheamus)
3
Of all his self-destructive moments, Jack Keal reflected, this must be his chef-d’oeuvre: nursing a roborant rye whiskey at 5am in Harry’s, last refuge of the middle-aged flaneur, as Linda winnows every trace of his life from the apartment they shared until that final tussle yesterday – and over what, the coastline of China? (by Sensil)
2
Winnowing the gallimaufry of non-sequiturs from her gratuitous tirade, he divined that the little woman was actually accusing him of being a befuddled flaneur, and merely because he'd snuck another roborant snifter before claiming that streetlamp - that really, really exquisite, ever so sexy streetlamp back there - as his very own chef-d'oeuvre. (by Bud Myte)
1
For many years the lad was thought to be a derelict, if not a wastrel, but his creation of that literary chef-d’ oeuvre proved the perfect roboration of his flaccid reputation and swiftly winnowed him from the ranks of the delinquent and elevated him to the eccentric flaneur we see today taking his daily siesta beneath the tables of the local cafes. (by gumo420)

10
My grandfather called me a flaneur, a pinwheel, just because at the age of 25 I still refused to winnow my life choices down to a single option; while his career was his lifelong roborant, for me the greatest chef-d’oeuvre is a life full of experiment and change. (by debbie)